Paper: Don’t ‘Have a Clue’? Unsupervised Co-Learning of Downward-Entailing Operators.

ACL ID P10-2046
Title Don’t ‘Have a Clue’? Unsupervised Co-Learning of Downward-Entailing Operators.
Venue Annual Meeting of the Association of Computational Linguistics
Session Short Paper
Year 2010
Authors

Researchers in textual entailment have begun to consider inferences involving downward-entailing operators, an inter- esting and important class of lexical items that change the way inferences are made. Recent work proposed a method for learn- ing English downward-entailing operators that requires access to a high-quality col- lection of negative polarity items (NPIs). However, English is one of the very few languages for which such a list exists. We propose the first approach that can be ap- plied to the many languages for which there is no pre-existing high-precision database of NPIs. As a case study, we apply our method to Romanian and show that our method yields good results. Also, we perform a cross-linguistic analysis that suggests interesting connections to some findings in linguist...