HLP@UPenn at SemEval-2017 Task 4A: A simple, self-optimizing text classification system combining dense and sparse vectors Abeed Sarker author Graciela Gonzalez author 2017-08 text Proceedings of the 11th International Workshop on Semantic Evaluation (SemEval-2017) Steven Bethard editor Marine Carpuat editor Marianna Apidianaki editor Saif M Mohammad editor Daniel Cer editor David Jurgens editor Association for Computational Linguistics Vancouver, Canada conference publication sarker-gonzalez-2017-hlp 10.18653/v1/S17-2105 https://aclanthology.org/S17-2105/ 2017-08 640 643