Coarse Lexical Semantic Annotation with Supersenses: An Arabic Case Study
What it is about
The authors reuse WordNet's supersense labels (the coarse lexicographer classes) as a light scheme for lexical semantics, and apply it to Arabic. They write guidelines for nominal expressions and annotate 2,219 sentences (65,452 tokens, 23,239 mentions) from Arabic Wikipedia articles in four domains, without needing a full semantic lexicon. Two annotators agreed on 87 sentences: mention-level F1 was 70%, token-level agreement 71% with Cohen's kappa 0.69, and soft F1 (any overlap counts) 79%. Eight of the ten most frequent labels reached 73 to 80% mention F1; QUANTITY (63%) and COGNITION (49%) were the weak ones. About half of all tokens are covered by a nominal supersense. Boundary decisions, such as a city and its country as one span, cause much of the disagreement.
Ideas
- I1.
ontolexfile layer: tag nouns of English running text with their WordNet supersense from the first-sense lexfile, with no disambiguation, and measure what share of EWT noun tokens is covered. The paper's Arabic figure is about half of all tokens; the English figure is the one to measure. - I2. Agreement gate for
annot: have a second person hand-tag about 80 sentences with the supersense scheme, then compute kappa, mention F1 and soft F1 against theannotsilver layer. Use these three numbers as the release gate before the silver layer is used for training. - I3. Span rule in
en/src/tok.rsoren/src/ptag.rs: treat a place name followed by a country as one span (for example "Fez, Morocco") in the supersense layer, and count how often the soft match and the strict match differ on the hand-tagged sample.
For Mova
The touch points are onto (WordNet lexfiles), en/src/ptag.rs and en/src/tok.rs (spans), and the annot teacher side for silver labels. The chapters are 11. Nouns and 19. The lexicon: vocabulary, multiword expressions and register. The paper's Arabic corpus is not used. Its scheme is the reusable part; any English figure must come from Mova's own text. Measure first the lexfile coverage of EWT nouns, with two identical runs.
Cite
@inproceedings{schneider2012coarse,
title = {{Coarse Lexical Semantic Annotation with Supersenses: An Arabic Case Study}},
author = {Schneider, Nathan and Mohit, Behrang and Oflazer, Kemal and Smith, Noah A.},
booktitle = {Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)},
year = {2012},
url = {https://aclanthology.org/P12-2050/}
}References
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