Paraphrase alignment for synonym evidence discovery

Authors:
Gintarė Grigonytė;João Cordeiro;Gaël Dias;Rumen Moraliyski;Pavel Brazdil
Affiliations:
Saarland University;University of Beira Interior;University of Beira Interior;University of Beira Interior;University of Porto
Venue:
COLING '10 Proceedings of the 23rd International Conference on Computational Linguistics
Year:
2010

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Abstract

We describe a new unsupervised approach for synonymy discovery by aligning paraphrases in monolingual domain corpora. For that purpose, we identify phrasal terms that convey most of the concepts within domains and adapt a methodology for the automatic extraction and alignment of paraphrases to identify paraphrase casts from which valid synonyms are discovered. Results performed on two different domain corpora show that general synonyms as well as synonymic expressions can be identified with a 67.27% precision.