Extracting Opinion Targets and Opinion Words from Online Reviews with Graph Co-ranking Kang Liu author Liheng Xu author Jun Zhao author 2014-06 text Proceedings of the 52nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers) Kristina Toutanova editor Hua Wu editor Association for Computational Linguistics Baltimore, Maryland conference publication liu-etal-2014-extracting 10.3115/v1/P14-1030 https://aclanthology.org/P14-1030/ 2014-06 314 324