Document-Level Multi-Aspect Sentiment Classification as Machine Comprehension Yichun Yin author Yangqiu Song author Ming Zhang author 2017-09 text Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing Martha Palmer editor Rebecca Hwa editor Sebastian Riedel editor Association for Computational Linguistics Copenhagen, Denmark conference publication yin-etal-2017-document 10.18653/v1/D17-1217 https://aclanthology.org/D17-1217/ 2017-09 2044 2054