Topic-wise, Sentiment-wise, or Otherwise? Identifying the Hidden Dimension for Unsupervised Text Classification Sajib Dasgupta author Vincent Ng author 2009-08 text Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing Philipp Koehn editor Rada Mihalcea editor Association for Computational Linguistics Singapore conference publication dasgupta-ng-2009-topic https://aclanthology.org/D09-1061/ 2009-08 580 589