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home / papers / 2023 / NusaX: Multilingual Parallel Sentiment Dataset for 10 Indonesian Local Languages

NusaX: Multilingual Parallel Sentiment Dataset for 10 Indonesian Local Languages

Paper · 2023 · Genta Indra Winata, Alham Fikri Aji, Samuel Cahyawijaya et al.

Summary

Most of Indonesia's 700+ languages have almost no public NLP datasets or benchmarks, even when they have millions of speakers. NusaX partly closes this gap by providing a human-built parallel resource that covers ten local languages: Javanese, Sundanese, Balinese, Madurese, Minangkabau, Acehnese, Banjarese, Buginese, Ngaju and Toba Batak. Each is aligned with Indonesian and English. The authors took a label-balanced sample of the Indonesian sentiment corpus SmSA (part of IndoNLU) and removed abusive and personal content by hand. Native bilingual annotators then translated it, preserving sentiment polarity, entities and full meaning, and a separate human quality check followed. Using Indonesian rather than English as the source keeps topics and entities culturally relevant. The resource supports sentiment analysis, machine translation and bilingual lexicons. It is used to benchmark classical machine learning, Indonesian LMs and multilingual LMs in few-shot and full-data settings. A central finding is that multilingual training beats monolingual training. Leaving the target language out of training entirely performs roughly as well as including it, so related languages can stand in for scarce target data. The paper also documents practical data-collection difficulties.

Key points

  • Data source: 1,000 sentences were drawn by stratified sampling from SmSA, which has over 11,000 comments and reviews from sources such as Twitter, Zomato and TripAdvisor. Each sentence was translated into all ten languages plus English.
  • Annotators: Each language had at least 2 native-speaker annotators, screened through trial translations and peer intelligibility review. English translators needed IELTS ≥ 6.5 or TOEFL PBT ≥ 600.
  • Languages and script: All ten are Austronesian (Malayo-Polynesian) languages from Sumatra, Borneo, Java, Madura and Sulawesi. All are written in Latin script in the dataset.
  • Collection hurdles: Platforms like MTurk do not support these languages. Coordination ran through WhatsApp and spreadsheets, and some annotators worked on phones or even on paper.
  • Release and limitations: The data is available at github.com/IndoNLP/nusax. The authors note limited domain coverage, possible translationese, self-reported fluency, and dialect choice that depends on the annotator.

Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.

 Institutions

Also on the byline: Kanda University of International Studies · Telkom University.

Cite

Cite as Genta Indra Winata, Alham Fikri Aji, Samuel Cahyawijaya, Rahmad Mahendra, Fajri Koto, Ade Romadhony, Kemal Kurniawan, David Moeljadi, Radityo Eko Prasojo, Pascale Fung, Timothy Baldwin, Jey Han Lau, Rico Sennrich and Sebastian Ruder. 2023. NusaX: Multilingual Parallel Sentiment Dataset for 10 Indonesian Local Languages. Proceedings of the 17th Conference of the European Chapter of the Association for Computational Linguistics.

The paper itself, not this page. BibTeX from the library's record of the work. DOI 10.18653/v1/2023.eacl-main.57

@inproceedings{winata2023nusax,
  title = {{NusaX: Multilingual Parallel Sentiment Dataset for 10 Indonesian Local Languages}},
  author = {Genta Indra Winata, Alham Fikri Aji, Samuel Cahyawijaya, Rahmad Mahendra, Fajri Koto, Ade Romadhony, Kemal Kurniawan, David Moeljadi, Radityo Eko Prasojo, Pascale Fung, Timothy Baldwin, Jey Han Lau, Rico Sennrich and Sebastian Ruder},
  booktitle = {Proceedings of the 17th Conference of the European Chapter of the Association for Computational Linguistics},
  year = {2023},
  doi = {10.18653/v1/2023.eacl-main.57},
  url = {https://doi.org/10.18653/v1/2023.eacl-main.57}
}

References

73 references, 21 of them with a card of ours. ↗ leads to the work, «find» searches for one we have no id for yet.

  1. David Ifeoluwa Adelani, Jade Abbott, Graham Neubig, Daniel D’souza, Julia Kreutzer, Constantine Lignos, Chester Palen-Michel, Happy Buzaaba, Shruti Rijhwani, Sebastian Ruder, Stephen Mayhew, Israel Abebe Azime, Shamsuddeen H. Muhammad, Chris Chinenye Emezue, Joyce Nakatumba-Nabende, Perez Ogayo, Are…
  2. Željko Agić and Ivan Vulić. 2019. JW300: A wide-coverage parallel corpus for low-resource languages. In Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, pages 3204– 3210, Florence, Italy. Association for Computational Linguistics.
  3. Alham Fikri Aji, Nikolay Bogoychev, Kenneth Heafield, and Rico Sennrich. 2020. In neural machine translation, what does transfer learning transfer? In Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics, pages 7701– 7710. find
  4. Alham Fikri Aji, Genta Indra Winata, Fajri Koto, Samuel Cahyawijaya, Ade Romadhony, Rahmad Mahendra, Kemal Kurniawan, David Moeljadi, Radityo Eko Prasojo, Timothy Baldwin, Jey Han Lau, and Sebastian Ruder. 2022. One country, 700+ languages: NLP challenges for underrepresented languages and dialects… find
  5. I Wayan Arka. 2003. Balinese morphosyntax: a lexical-functional approach. Pacific Linguistics. find
  6. Mikel Artetxe, Gorka Labaka, and Eneko Agirre. 2018. A robust self-learning method for fully unsupervised cross-lingual mappings of word embeddings. In Proceedings of the 56th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), pages 789–798, Melbourne, Australia…
  7. Annisa Nurul Azhar, Masayu Leylia Khodra, and Arie Pratama Sutiono. 2019. Multi-label aspect categorization with convolutional neural networks and extreme gradient boosting. In 2019 International Conference on Electrical Engineering and Informatics (ICEEI), pages 35–40. IEEE. find
  8. Alan W Black. 2019. Cmu wilderness multilingual speech dataset. In ICASSP 2019-2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pages 5971–5975. IEEE. find
  9. Robert Blust et al. 2013. The Austronesian Languages. The Australian National University. find
  10. Widodo Budiharto and Meiliana Meiliana. 2018. Prediction and analysis of indonesia presidential election from twitter using sentiment analysis. Journal of Big data, 5(1):1–10. find
  11. Samuel Cahyawijaya, Genta Indra Winata, Bryan Wilie, Karissa Vincentio, Xiaohong Li, Adhiguna Kuncoro, Sebastian Ruder, Zhi Yuan Lim, Syafri Bahar, Masayu Khodra, Ayu Purwarianti, and Pascale Fung. 2021. IndoNLG: Benchmark and resources for evaluating Indonesian natural language generation. In Proce… find
  12. Yahya Eru Cakra and Bayu Distiawan Trisedya. 2015. Stock price prediction using linear regression based on sentiment analysis. In 2015 international conference on advanced computer science and information systems (ICACSIS), pages 147–154. IEEE. find
  13. Alexis Conneau, Kartikay Khandelwal, Naman Goyal, Vishrav Chaudhary, Guillaume Wenzek, Francisco Guzmán, Edouard Grave, Myle Ott, Luke Zettlemoyer, and Veselin Stoyanov. 2020. Unsupervised cross-lingual representation learning at scale. In Proceedings of the 58th Annual Meeting of the Association fo… find
  14. Alexis Conneau, Ruty Rinott, Guillaume Lample, Adina Williams, Samuel Bowman, Holger Schwenk, and Veselin Stoyanov. 2018. XNLI: Evaluating cross-lingual sentence representations. In Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing, pages 2475–2485, Brussels, Bel… find
  15. Sophie Elizabeth Crouch. 2009. Voice and verb morphology in Minangkabau, a language of West Sumatra, Indonesia. Ph.D. thesis, The University of Western Australia. find
  16. William D Davies. 2010. A grammar of Madurese. Mouton De Gruyter. find
  17. Jacob Devlin, Ming-Wei Chang, Kenton Lee, and Kristina Toutanova. 2019. Bert: Pre-training of deep bidirectional transformers for language understanding. In Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies,…
  18. David M. Eberhard, Gary F. Simons, and Charles D. Fennig. 2021. Ethnologue: Languages of the World. Twenty-fourth edition. Dallas, Texas: SIL International. find
  19. Abteen Ebrahimi, Manuel Mager, Arturo Oncevay, Vishrav Chaudhary, Luis Chiruzzo, Angela Fan, John Ortega, Ricardo Ramos, Annette Rios, Ivan Vladimir Meza Ruiz, Gustavo Giménez-Lugo, Elisabeth Mager, Graham Neubig, Alexis Palmer, Rolando Coto-Solano, Thang Vu, and Katharina Kann. 2022. AmericasNLI: E…
  20. Franti ek Čermák and Alexandr Rosen. 2012. The case of intercorp, a multilingual parallel corpus. International Journal of Corpus Linguistics, 17(3):411–427. find
  21. M Ali Fauzi. 2019. Word2vec model for sentiment analysis of product reviews in indonesian language. International Journal of Electrical and Computer Engineering, 9(1):525. find
  22. Dirk Goldhahn, Thomas Eckart, and Uwe Quasthoff. 2012. Building large monolingual dictionaries at the Leipzig corpora collection: From 100 to 200 languages. In Proceedings of the Eighth International Conference on Language Resources and Evaluation (LREC’12), pages 759–765, Istanbul, Turkey. European…
  23. Tri Wahyu Guntara, Alham Fikri Aji, and Radityo Eko Prasojo. 2020. Benchmarking multidomain english-indonesian machine translation. In Proceedings of the 13th Workshop on Building and Using Comparable Corpora, pages 35–43. find
  24. Francisco Guzmán, Peng-Jen Chen, Myle Ott, Juan Pino, Guillaume Lample, Philipp Koehn, Vishrav Chaudhary, and Marc’Aurelio Ranzato. 2019. The FLORES evaluation datasets for low-resource machine translation: Nepali–English and Sinhala– English. In Proceedings of the 2019 Conference on Empirical Metho…
  25. Barry Haddow and Faheem Kirefu. 2020. Pmindia–a collection of parallel corpora of languages of india. arXiv preprint arXiv:2001.09907. — [arXiv:2001.09907](https://arxiv.org/abs/2001.09907) find
  26. Junjie Hu, Sebastian Ruder, Aditya Siddhant, Graham Neubig, Orhan Firat, and Melvin Johnson. 2020. XTREME: A Massively Multilingual Multi-task Benchmark for Evaluating Cross-lingual Generalization. In Proceedings of ICML 2020.
  27. Mochamad Ibrahim, Omar Abdillah, Alfan F Wicaksono, and Mirna Adriani. 2015. Buzzer detection and sentiment analysis for predicting presidential election results in a twitter nation. In 2015 IEEE international conference on data mining workshop (ICDMW), pages 1348–1353. IEEE. find
  28. Kenji Imamura and Eiichiro Sumita. 2018. Multilingual parallel corpus for global communication plan. In Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018). find
  29. David Kamholz, Jonathan Pool, and Susan Colowick. 2014. PanLex: Building a resource for panlingual lexical translation. In Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC’14), pages 3145–3150, Reykjavik, Iceland. European Language Resources Association (E… find
  30. Simran Khanuja, Sandipan Dandapat, Anirudh Srinivasan, Sunayana Sitaram, and Monojit Choudhury. 2020. Gluecos: An evaluation benchmark for code-switched nlp. In Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics, pages 3575–3585.
  31. Philipp Koehn, Hieu Hoang, Alexandra Birch, Chris Callison-Burch, Marcello Federico, Nicola Bertoldi, Brooke Cowan, Wade Shen, Christine Moran, Richard Zens, et al. 2007. Moses: Open source toolkit for statistical machine translation. In Proceedings of the 45th annual meeting of the association for… find
  32. Fajri Koto and Ikhwan Koto. 2020. Towards computational linguistics in Minangkabau language: Studies on sentiment analysis and machine translation. In Proceedings of the 34th Pacific Asia Conference on Language, Information and Computation, pages 138– 148, Hanoi, Vietnam. Association for Computation… find
  33. Fajri Koto, Afshin Rahimi, Jey Han Lau, and Timothy Baldwin. 2020. Indolem and indobert: A benchmark dataset and pre-trained language model for indonesian nlp. In Proceedings of the 28th International Conference on Computational Linguistics, pages 757– 770. find
  34. Eri Kurniawan. 2013. Sundanese complementation. Ph.D. thesis, The University of Iowa. find
  35. Zhaojiang Lin, Andrea Madotto, Genta Indra Winata, Peng Xu, Feijun Jiang, Yuxiang Hu, Chen Shi, and Pascale Fung. 2021. BiToD: A bilingual multi-domain dataset for task-oriented dialogue modeling. In Thirty-fifth Conference on Neural Information Processing Systems Datasets and Benchmarks Track (Roun… find
  36. Hiroki Nomoto, Kenji Okano, David Moeljadi, and Hideo Sawada. 2018. Tufs asian language parallel corpus (talpco). In Proceedings of the twenty-fourth annual meeting of the Association for Natural Language Processing, pages 436–439. find
  37. Yinhan Liu, Jiatao Gu, Naman Goyal, Xian Li, Sergey Edunov, Marjan Ghazvininejad, Mike Lewis, and Luke Zettlemoyer. 2020. Multilingual denoising pre-training for neural machine translation. Transactions of the Association for Computational Linguistics, 8:726–742. find
  38. Deden Ade Nurdeni, Indra Budi, and Aris Budi Santoso. 2021. Sentiment analysis on covid19 vaccines in indonesia: From the perspective of sinovac and pfizer. In 2021 3rd East Indonesia Conference on Computer and Information Technology (EIConCIT), pages 122– 127. IEEE. find
  39. Rahmad Mahendra, Alham Fikri Aji, Samuel Louvan, Fahrurrozi Rahman, and Clara Vania. 2021. IndoNLI: A natural language inference dataset for Indonesian. In Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing, pages 10511–10527, Online and Punta Cana, Dominican Repu… find
  40. Xiaoman Pan, Boliang Zhang, Jonathan May, Joel Nothman, Kevin Knight, and Heng Ji. 2017. Cross-lingual name tagging and linking for 282 languages. In Proceedings of the 55th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), pages 1946–1958, Vancouver, Canada. A…
  41. Shamsuddeen Hassan Muhammad, David Adelani, Anuoluwapo Aremu, and Idris Abdulmumin. 2022. NaijaSenti: A nigerian Twitter sentiment corpus for multilingual sentiment analysis. In Proceedings of the Thirteenth Language Resources and Evaluation Conference, pages 590–602, Marseille, France. European Lan…
  42. Femphy Pisceldo, Rahmad Mahendra, Ruli Manurung, and I Wayan Arka. 2008. A two-level morphological analyser for the Indonesian language. In Proceedings of the Australasian Language Technology Association Workshop 2008, pages 142–150, Hobart, Australia. find
  43. Herri Mulyono, Gunawan Suryoputro, and Shafa Ra-madhanya Jamil. 2021. The application of whatsapp to support online learning during the covid-19 pandemic in indonesia. Heliyon, 7(8):e07853. find
  44. Arbi Haza Nasution, Yohei Murakami, and Toru Ishida. 2021. Plan optimization to bilingual dictionary induction for low-resource language families. ACM Transactions Asian Low-Resource Language Information Processing, 20(2). find
  45. Wilhelmina Nekoto, Vukosi Marivate, Tshinondiwa Matsila, Timi Fasubaa, Tajudeen Kolawole, Taiwo Fagbohungbe, Solomon Oluwole Akinola, Shamsuddee Hassan Muhammad, Salomon Kabongo, Salomey Osei, Sackey Freshia, Rubungo Andre Niyongabo, Ricky Macharm, Perez Ogayo, Orevaoghene Ahia, Musie Meressa, Mofe…
  46. Made Nindyatama Nityasya, Haryo Akbarianto Wibowo, Radityo Eko Prasojo, and Alham Fikri Aji. 2021. Costs to consider in adopting NLP for your business. find
  47. Edoardo Maria Ponti, Goran Glavaš, Olga Majewska, Qianchu Liu, Ivan Vulić, and Anna Korhonen. 2020. XCOPA: A multilingual dataset for causal commonsense reasoning. In Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP), pages 2362–2376, Online. Association…
  48. Matt Post. 2018. A call for clarity in reporting BLEU scores. In Proceedings of the Third Conference on Machine Translation: Research Papers, pages 186– 191, Belgium, Brussels. Association for Computational Linguistics.
  49. Ayu Purwarianti and Ida Ayu Putu Ari Crisdayanti. 2019. Improving bi-lstm performance for indonesian sentiment analysis using paragraph vector. In 2019 International Conference of Advanced Informatics: Concepts, Theory and Applications (ICAICTA), pages 1–5. IEEE. find
  50. Oddy Virgantara Putra, Fathin Muhammad Wasman-son, Triana Harmini, and Shoffin Nahwa Utama. 2020. Sundanese twitter dataset for emotion classification. In 2020 International Conference on Computer Engineering, Network, and Intelligent Multimedia (CENIM), pages 391–395. IEEE. find
  51. Shofianina Dwi Ananda Putri, Muhammad Okky Ibrohim, and Indra Budi. 2021. Abusive language and hate speech detection for Indonesian-local language in social media text. In Recent Advances in Information and Communication Technology 2021, pages 88–98, Cham. Springer International Publishing. find
  52. Gowtham Ramesh, Sumanth Doddapaneni, Aravinth Bheemaraj, Mayank Jobanputra, Raghavan AK, Ajitesh Sharma, Sujit Sahoo, Harshita Diddee, Mahalakshmi J, Divyanshu Kakwani, Navneet Kumar, Aswin Pradeep, Srihari Nagaraj, Kumar Deepak, Vivek Raghavan, Anoop Kunchukuttan, Pratyush Kumar, and Mitesh Shantad…
  53. Philip Resnik, Mari Broman Olsen, and Mona Diab. 1999. The bible as a parallel corpus: Annotating the ‘book of 2000 tongues’. Computers and the Humanities, 33(1):129–153. find
  54. Hammam Riza, Michael Purwoadi, Teduh Uliniansyah, Aw Ai Ti, Sharifah Mahani Aljunied, Luong Chi Mai, Vu Tat Thang, Nguyen Phuong Thai, Vichet Chea, Sethserey Sam, et al. 2016. Introduction of the asian language treebank. In 2016 Conference of The Oriental Chapter of International Committee for Coord… find
  55. Tommy Wijaya Sagala, Mei Silviana Saputri, Rahmad Mahendra, and Indra Budi. 2020. Stock price movement prediction using technical analysis and sentiment analysis. In Proceedings of the 2020 2nd Asia Pacific Information Technology Conference, pages 123–127. find
  56. Sakriani Sakti and Satoshi Nakamura. 2013. Towards language preservation: Design and collection of graphemically balanced and parallel speech corpora of indonesian ethnic languages. In 2013 International Conference Oriental COCOSDA held jointly with 2013 Conference on Asian Spoken Language Research… find
  57. Holger Schwenk, Vishrav Chaudhary, Shuo Sun, Hongyu Gong, and Francisco Guzmán. 2021. Wiki-Matrix: Mining 135M parallel sentences in 1620 language pairs from Wikipedia. In Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Main Volume, pages… find
  58. James Neil Sneddon. 2003. The Indonesian language: Its history and role in modern society. UNSW Press, Sydney. find
  59. Richard Socher, Alex Perelygin, Jean Wu, Jason Chuang, Christopher D Manning, Andrew Y Ng, and Christopher Potts. 2013. Recursive deep models for semantic compositionality over a sentiment treebank. In Proceedings of the 2013 conference on empirical methods in natural language processing, pages 1631… find
  60. Ralf Steinberger, Bruno Pouliquen, Anna Widiger, Camelia Ignat, Tomaz Erjavec, Dan Tufis, and Dániel Varga. 2006. The jrc-acquis: A multilingual aligned parallel corpus with 20+ languages. arXiv preprint cs/0609058.
  61. Stephanie Strassel and Jennifer Tracey. 2016. Lorelei language packs: Data, tools, and resources for technology development in low resource languages. In Proceedings of the Tenth International Conference on Language Resources and Evaluation (LREC’16), pages 3273–3280.
  62. Motomitsu Uchibori and Norio Shibata. 1988. Ngaju-Dayak Language. The Sanseido Encyclopedia of Linguistics: Languages of The World, 1:1156–1160. find
  63. Daan van Esch, Tamar Lucassen, Sebastian Ruder, Isaac Caswell, and Clara E Rivera. 2022. Writing system and speaker metadata for 2,800+ language varieties. In Proceedings of the 13th Language Resources and Evaluation Conference, Marseille, France. find
  64. Xinyi Wang, Sebastian Ruder, and Graham Neubig. 2022. Expanding pretrained models to thousands more languages via lexicon-based adaptation. In Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers), pages 863–877, Dublin, Ireland. Association…
  65. Sukardi Weda. 2016. Syntactic variation of buginese, a language in austronesian great family. Kongres Inter-nasional Masyarakat Linguistik Indonesia (KIMLI) 2016, pages 838–841. find
  66. Wedhawati Wedhawati, Wiwin E.S.N., Sri Nardiati, Herawati Herawati, Restu Sukesti, Marsono Marsono, Edi Setiyanto, Dirgo Sabariyanto, Syamsul Arifin, Sumadi Sumadi, and Laginem Laginem. 2001. Tata bahasa Jawa mutakhir. Badan Pengembangan dan Pembinaan Bahasa. find
  67. Haryo Akbarianto Wibowo, Made Nindyatama Nityasya, Afra Feyza Akyürek, Suci Fitriany, Alham Fikri Aji, Radityo Eko Prasojo, and Derry Tanti Wijaya. 2021. IndoCollex: A testbed for morphological transformation of Indonesian word colloquialism. In Findings of the Association for Computational Linguist… find
  68. Haryo Akbarianto Wibowo, Tatag Aziz Prawiro, Muhammad Ihsan, Alham Fikri Aji, Radityo Eko Prasojo, Rahmad Mahendra, and Suci Fitriany. 2020. Semi-supervised low-resource style transfer of Indonesian informal to formal language with iterative forward-translation. In 2020 International Conference on A… find
  69. Bryan Wilie, Karissa Vincentio, Genta Indra Winata, Samuel Cahyawijaya, Xiaohong Li, Zhi Yuan Lim, Sidik Soleman, Rahmad Mahendra, Pascale Fung, Syafri Bahar, and Ayu Purwarianti. 2020. IndoNLU: Benchmark and resources for evaluating Indonesian natural language understanding. In Proceedings of the 1…
  70. Genta Winata, Shijie Wu, Mayank Kulkarni, Thamar Solorio, and Daniel Preoţiuc-Pietro. 2022. Cross-lingual few-shot learning on unseen languages. In Proceedings of the 2nd Conference of the Asia-Pacific Chapter of the Association for Computational Linguistics and the 12th International Joint Confere… find
  71. Genta Indra Winata, Andrea Madotto, Zhaojiang Lin, Rosanne Liu, Jason Yosinski, and Pascale Fung. 2021. Language models are few-shot multilingual learners. In Proceedings of the 1st Workshop on Multilingual Representation Learning, pages 1–15.
  72. Wilson Wongso, Henry Lucky, and Derwin Suhartono. 2022. Pre-trained transformer-based language models for sundanese. Journal of Big Data, 9(1):1–17. find
  73. Linting Xue, Noah Constant, Adam Roberts, Mihir Kale, Rami Al-Rfou, Aditya Siddhant, Aditya Barua, and Colin Raffel. 2021. mT5: A massively multilingual pre-trained text-to-text transformer. In Proceedings of the 2021 Conference of the North American Chapter of the Association for Computational Ling…

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