What’s with the Attitude? Identifying Sentences with Attitude in Online Discussions Ahmed Hassan author Vahed Qazvinian author Dragomir Radev 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 hassan-etal-2010-whats https://aclanthology.org/D10-1121/ 2010-10 1245 1255