Pattern Learning for Relation Extraction with a Hierarchical Topic Model Enrique Alfonseca author Katja Filippova author Jean-Yves Delort author Guillermo Garrido author 2012-07 text Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers) Haizhou Li editor Chin-Yew Lin editor Miles Osborne editor Gary Geunbae Lee editor Jong C Park editor Association for Computational Linguistics Jeju Island, Korea conference publication alfonseca-etal-2012-pattern https://aclanthology.org/P12-2011/ 2012-07 54 59