Topic Extraction based on Prior Knowledge obtained from Target Documents Kayo Tatsukawa author 2012-07 text Proceedings of ACL 2012 Student Research Workshop Jackie C K Cheung editor Jun Hatori editor Carlos Henriquez editor Ann Irvine editor Association for Computational Linguistics Jeju Island, Korea conference publication tatsukawa-2012-topic https://aclanthology.org/W12-3306/ 2012-07 31 36