Opinion Extraction Using a Learning-Based Anaphora Resolution Technique Nozomi Kobayashi author Ryu Iida author Kentaro Inui author Yuji Matsumoto author 2005 text Companion Volume to the Proceedings of Conference including Posters/Demos and tutorial abstracts conference publication kobayashi-etal-2005-opinion https://aclanthology.org/I05-2030/ 2005