Publication
Improvement of n-ary Relation Extraction by Adding Lexical Semantics to Distant-Supervision Rule Learning
Hong Li; Sebastian Krause; Feiyu Xu; Andrea Moro; Hans Uszkoreit; Roberto Navigli
In: ICAART 2015 - Proceedings of the 7th International Conference on Agents and Artificial Intelligence. International Conference on Agents and Artificial Intelligence (ICAART-15), 7th, January 10-12, Lisbon, Portugal, SciTePress, 2015.
Abstract
A new method is proposed and evaluated that improves distantly supervised learning of pattern rules for n-ary relation extraction. The new method employs knowledge from a large lexical semantic repository to guide the discovery of patterns in parsed relation mentions. It extends the induced rules to semantically relevant material outside the minimal subtree containing the shortest paths connecting the relation entities and also discards rules without any explicit semantic content. It significantly raises both recall and precision with roughly 20% f-measure boost in comparison to the baseline system which does not consider the lexical semantic information.