Extracting Opinion Targets in a Single and Cross-Domain Setting with Conditional Random Fields Niklas Jakob author Iryna Gurevych author 2010-10 text Proceedings of the 2010 Conference on Empirical Methods in Natural Language Processing Hang Li editor Lluís Màrquez editor Association for Computational Linguistics Cambridge, MA conference publication jakob-gurevych-2010-extracting https://aclanthology.org/D10-1101/ 2010-10 1035 1045