AAAI Publications, Twenty-Second International Joint Conference on Artificial Intelligence

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Unsupervised Lexicon Acquisition for HPSG-Based Relation Extraction
Benjamin Rozenfeld, Ronen Feldman

Last modified: 2011-06-28


The paper describes a method of relation extraction, which is based on parsing the input text using a combination of a generic HPSG-based grammar and a highly focused domain- and relation-specific lexicon. We also show a method of unsupervised acquisition of such a lexicon from a large unlabeled corpus. Together, the methods introduce a novel approach to the “Open IE” task, which is superior in accuracy and in quality of relation identification to the existing approaches.

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