{"type":"ScholarlyArticle","title":"Unsupervised Lexicon Acquisition for HPSG-Based Relation Extraction","authors":[{"name":"Benjamin Rozenfeld","slug":"benjamin-rozenfeld","given":"Benjamin","family":"Rozenfeld","affiliation":""},{"name":"Ronen Feldman","slug":"ronen-feldman","given":"Ronen","family":"Feldman","affiliation":""}],"abstract":"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.","doi":"10.5591/978-1-57735-516-8/IJCAI11-316","url":"https://ijcai.org/proceedings/2011/316","pdf":"https://ijcai.org/proceedings/2011/0316.pdf","markdown":"https://ijcai.org/proceedings/2011/316.md","bibtex":"https://ijcai.org/proceedings/2011/bibtex/316","volume":{"slug":"2011","title":"Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2011","url":"https://ijcai.org/proceedings/2011/","year":2011,"location":"Barcelona, Catalonia, Spain","dates":"16–22 July 2011","editors":"Toby Walsh","isbn":"978-1-57735-512-0; 978-1-57735-513-7; 978-1-57735-514-4; 978-1-57735-515-1; 978-1-57735-516-8","publisher":"AAAI Press/International Joint Conferences on Artificial Intelligence","doi_prefix":""},"section":null,"track":"","number":316,"pages":{"first":1890,"last":1894},"keywords":[],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}