BLCU-NLP at SemEval-2020 Task 5: Data Augmentation for Efficient Counterfactual Detecting Chang Liu author Dong Yu author 2020-12 text Proceedings of the Fourteenth Workshop on Semantic Evaluation Aurelie Herbelot editor Xiaodan Zhu editor Alexis Palmer editor Nathan Schneider editor Jonathan May editor Ekaterina Shutova editor International Committee for Computational Linguistics Barcelona (online) conference publication liu-yu-2020-blcu 10.18653/v1/2020.semeval-1.81 https://aclanthology.org/2020.semeval-1.81/ 2020-12 633 639