Unsupervised Construction of Large Paraphrase Corpora: Exploiting Massively Parallel News Sources Bill Dolan author Chris Quirk author Chris Brockett author 2004-aug 23–aug 27 text COLING 2004: Proceedings of the 20th International Conference on Computational Linguistics COLING Geneva, Switzerland conference publication dolan-etal-2004-unsupervised https://aclanthology.org/C04-1051/ 2004-aug 23–aug 27 350 356