Syntax-based Alignment of Multiple Translations: Extracting Paraphrases and Generating New Sentences Bo Pang author Kevin Knight author Daniel Marcu author 2003 text Proceedings of the 2003 Human Language Technology Conference of the North American Chapter of the Association for Computational Linguistics conference publication pang-etal-2003-syntax https://aclanthology.org/N03-1024/ 2003 181 188