Interpretable Word Sense Representations via Definition Generation: The Case of Semantic Change Analysis
What it is about
The authors generate a natural-language definition for each usage of a target word with a fine-tuned Flan-T5 model. Usages are first grouped into clusters, which stand for senses. For each cluster the most prototypical generated definition becomes the sense label. These labels are then used in semantic change analysis, so that a change in a word's usage can be read as a change in its definitions. On word-in-context similarity judgements, the definition-based representations beat token embeddings. For the sense labels, annotators found neither label satisfactory for 15% of clusters. A definition-based label was judged better than a usage-based one in 31% of cases, the reverse in 7%, and definition-based labels were of sufficient quality in 80% of instances, against 68% for usage-based labels.
Ideas
- I1.
onto/src/wsd.rs: label each sense cluster of a word with the WordNet gloss that best matches its usages, using a bag of co-occurring content words, and keep the gloss choice as an explanation. Measure the share of acceptable labels on a hand-judged sample of clusters; the paper's 80% is the bar to beat. - I2. Diachronic check in
tools/gutenberg: take a word that changes sense between an early and a late book (for example "wit" or "prevent") and report the usage counts per period per WordNet sense. This makes the change readable without a neural model. Use only public-domain texts. - I3. Similarity test: compute a count-based usage similarity (cosine of co-occurrence vectors) for pairs of usages of the same word, and report its Spearman correlation with human graded judgements in the English DWUG data. Use that set for tests only.
For Mova
The touch points are onto/src/wsd.rs (sense choice and explanations), tools/gutenberg (public-domain books) and the en tokenizer for context windows. The chapter is 37. Register and variation, with 19. The lexicon: vocabulary, multiword expressions and register. The paper's Flan-T5 model is a neural teacher idea; Mova takes only the prototype-label step, and the DWUG data is for tests only. Measure first the share of acceptable WordNet labels on a small hand-judged sample of clusters.
Cite
@inproceedings{giulianelli2023interpretable,
title = {{Interpretable Word Sense Representations via Definition Generation: The Case of Semantic Change Analysis}},
author = {Giulianelli, Mario and Luden, Iris and Fernandez, Raquel and Kutuzov, Andrey},
booktitle = {ACL 2023 (Toronto)},
year = {2023},
doi = {10.18653/v1/2023.acl-long.176},
eprint = {2305.11993},
archivePrefix = {arXiv},
url = {https://doi.org/10.18653/v1/2023.acl-long.176}
}References
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- Length Relative Position Absolute Position BertScore Bleu Nist Length Relative Position Absolute Position BertScore Bleu Nist 1.000000 -0.121793 0.575304 0.067180 0.076133 0.044873 -0.121793 1.000000 0.626032 0.052725 0.074697 0.062041 0.575304 0.626032 1.000000 0.128785 0.159078 0.110559 0.067180 0… find
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