Annotating the meaning of discourse connectives by looking at their translation: The translation-spotting technique
Summary
Discourse connectives such as since or while can signal several different coherence relations, and machine translation systems often choose the wrong equivalent. Within the Swiss COMTIS project, which aims to improve statistical machine translation between English and French, the authors needed manually labelled reference data to train connective classifiers. Classic sense annotation, where judges choose labels from an inventory like the Penn Discourse Treebank (PDTB) hierarchy, yielded only modest inter-annotator agreement. As an alternative, they propose translation spotting. Instead of reasoning explicitly about abstract senses, annotators identify how each connective was rendered by professional translators in large parallel corpora. When the target language does not disambiguate directly, the observed translations are grouped into sense clusters, based on native speakers' judgements of which target connectives are interchangeable in context. The authors argue that this produces more reliable reference data than sense annotation. They also show that it reveals fine-grained distinctions, for example among causal connectives, and provides empirical material for contrastive studies of discourse relations.
Key points
- The PDTB, built on the WSJ corpus of about 1M tokens, contains 18,459 explicit and 16,053 implicit annotated relations. Its sense hierarchy has 4 top-level classes, 16 second-level types and 23 third-level subtypes.
- Agreement in the PDTB is 92% at the top level but falls to 77% at the finest level. For 100 tokens of while, overall agreement was only 67%.
- Of roughly 100 explicit PDTB connectives, 29 always receive a single sense (412 occurrences). Another 52 carry labels from different top-level classes, and these were the authors' annotation focus.
- The method has limits. It depends on translators' choices and needs large amounts of data. It also cannot separate senses that the target language expresses with a single connective.
- Double labels such as temporal-causal for since and background-contrast for alors que proved useful in classification. A three-way classifier nearly matched the two-way one for since and outperformed it for alors que.
Cited by
- Constructing a Lexicon of English Discourse Connectives
- Inducing Discourse Connectives from Parallel Texts
- Using Explicit Discourse Connectives in Translation for Implicit Discourse Relation Classification
Cite
@inproceedings{cartoni2013annotating,
title = {{Annotating the meaning of discourse connectives by looking at their translation: The translation-spotting technique}},
author = {Cartoni, Bruno and Zufferey, Sandrine and Meyer, Thomas},
booktitle = {Dialogue \& Discourse Volume 4},
year = {2013},
doi = {10.5087/dad.2013.204},
url = {https://doi.org/10.5087/dad.2013.204}
}References
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