Hierarchical Sequential Learning for Extracting Opinions and Their Attributes Yejin Choi author Claire Cardie author 2010-07 text Proceedings of the ACL 2010 Conference Short Papers Jan Hajič editor Sandra Carberry editor Stephen Clark editor Joakim Nivre editor Association for Computational Linguistics Uppsala, Sweden conference publication choi-cardie-2010-hierarchical https://aclanthology.org/P10-2050/ 2010-07 269 274