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Aggregating Crowdsourced and Automatic Judgments to Scale Up a Corpus of Anaphoric Reference for Fiction and Wikipedia Texts

Paper · 2023 · Juntao Yu, Silviu Paun, Maris Camilleri et al.

Summary

Existing coreference corpora are mostly mid-sized, concentrated on news or science, short-document, and often skip singletons and non-referring expressions. The authors release Phrase Detectives 3.0, an English anaphora corpus labelled mainly through the Phrase Detectives game-with-a-purpose, covering fiction and Wikipedia. Players fully annotated only about 70% of documents, so the authors propose an iterative resolve-and-aggregate procedure. An automatic anaphoric resolver labels every mention, including those humans never reached. Its output is then merged with the crowd judgments by a probabilistic aggregation method built for anaphora. The enlarged dataset is used to retrain the resolver, and the cycle repeats. Models trained on the completed corpus beat models trained only on fully player-annotated documents and models trained on the uncompleted full corpus. The resulting resource matches ONTONOTES in token count, has roughly twice as many markables, and contains many long documents. This gives the field training and test data for underrepresented genres and for long-document coreference.

Key points

  • Phrase Detectives 3.0 has about 1.37M tokens and roughly twice the markables of ONTONOTES; the counts of non-singleton markables are similar.
  • The annotation scheme is a simplified ARRAU scheme. Every noun phrase is marked as referring or non-referring, and singletons are included.
  • In the game, each markable gets at least 8 player judgments (20 on average), and each competing interpretation is checked by at least four other players in a validation game.
  • Document length reaches 14K tokens. Other corpora have much shorter documents on average: PRECO averages 329 tokens, ONTONOTES 467, ARRAU 630, and earlier Phrase Detectives 753.
  • With gold mentions and singletons excluded, LONGFORMER outperforms ROBERTA on the corpus by 0.9% CoNLL F1 on short documents and 2% on long ones.

Interesting ideas

  • I1. When human coverage of a dataset is incomplete, a model can supply labels for the gaps, and model labels can be pooled with human ones through a principled aggregator; the improved data then retrains the model in a loop.
  • I2. Annotation is split into two roles: one person proposes a reading, and others only agree or disagree with each competing reading, which is cheaper and more reliable than open labelling.
  • I3. Annotators work against gold data until they reach sufficient accuracy, and only then are allowed onto unlabelled items.
  • I4. A test set that separates long and short documents can reveal architectural differences that a short-document benchmark hides.
  • I5. Explicitly marking non-referring expressions and singletons, rather than leaving them unannotated, makes the referential status of every noun phrase part of the data.

For Mova

How these ideas could serve Mova, our small open language model — its files, stages and tests:

  • I1 (learn): Silver data could treat human corrections and the witness parsers' outputs as votes in a single aggregation step, then retrain and re-aggregate, rather than trusting any single source.
  • I2 (learn): When parsers or LLM teacher tiers disagree on an arc or a coreference link, the alternatives could go to a yes/no validator tier instead of asking for a fresh analysis.
  • I3 (learn): New witness parsers or teacher prompts could have to pass a gold-checked qualification set before their votes count toward silver data.
  • I4 (frames): Evaluation of coreference in crate prag should report scores by document length, so that failures in long-range tracking across whole tales are not averaged away.
  • I5 (world): The world builder could decide per noun phrase whether to create an entity at all, which avoids phantom entities from expletive or predicative phrases.

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

 Fields, topics and concepts

Cite

Cite as Juntao Yu, Silviu Paun, Maris Camilleri, Paloma Garcia, Jon Chamberlain, Udo Kruschwitz and Massimo Poesio. 2023. Aggregating Crowdsourced and Automatic Judgments to Scale Up a Corpus of Anaphoric Reference for Fiction and Wikipedia Texts. 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.54 · arXiv 2210.05581

@inproceedings{yu2023aggregating,
  title = {{Aggregating Crowdsourced and Automatic Judgments to Scale Up a Corpus of Anaphoric Reference for Fiction and Wikipedia Texts}},
  author = {Juntao Yu, Silviu Paun, Maris Camilleri, Paloma Garcia, Jon Chamberlain, Udo Kruschwitz and Massimo Poesio},
  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.54},
  eprint = {2210.05581},
  archivePrefix = {arXiv},
  url = {https://doi.org/10.18653/v1/2023.eacl-main.54}
}

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