An Ontology-Based Approach for Key Phrase Extraction Chau Q. Nguyen author Tuoi T. Phan author 2009-08 text Proceedings of the ACL-IJCNLP 2009 Conference Short Papers Keh-Yih Su editor Jian Su editor Janyce Wiebe editor Haizhou Li editor Association for Computational Linguistics Suntec, Singapore conference publication q-nguyen-t-phan-2009-ontology https://aclanthology.org/P09-2046/ 2009-08 181 184