An Iterative Reinforcement Approach for Fine-Grained Opinion Mining Weifu Du author Songbo Tan author 2009-06 text Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics Mari Ostendorf editor Michael Collins editor Shri Narayanan editor Douglas W Oard editor Lucy Vanderwende editor Association for Computational Linguistics Boulder, Colorado conference publication du-tan-2009-iterative https://aclanthology.org/N09-1055/ 2009-06 486 493