Paper: Learning 5000 Relational Extractors

ACL ID P10-1030
Title Learning 5000 Relational Extractors
Venue Annual Meeting of the Association of Computational Linguistics
Session Main Conference
Year 2010

Many researchers are trying to use information extraction (IE) to create large-scale knowl- edge bases from natural language text on the Web. However, the primary approach (su- pervised learning of relation-specific extrac- tors) requires manually-labeled training data for each relation and doesn’t scale to the thou- sands of relations encoded in Web text. This paper presents LUCHS, a self-supervised, relation-specific IE system which learns 5025 relations — more than an order of magnitude greater than any previous approach — with an average F1 score of 61%. Crucial to LUCHS’s performance is an automated system for dy- namic lexicon learning, which allows it to learn accurately from heuristically-generated training data, which is often noisy and sparse.