SemEval-2015 Task 1: Paraphrase and Semantic Similarity in Twitter (PIT) Wei Xu author Chris Callison-Burch author Bill Dolan author 2015-06 text Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015) Preslav Nakov editor Torsten Zesch editor Daniel Cer editor David Jurgens editor Association for Computational Linguistics Denver, Colorado conference publication xu-etal-2015-semeval 10.18653/v1/S15-2001 https://aclanthology.org/S15-2001/ 2015-06 1 11