EmoNLP at SemEval-2018 Task 2: English Emoji Prediction with Gradient Boosting Regression Tree Method and Bidirectional LSTM Man Liu author 2018-06 text Proceedings of the 12th International Workshop on Semantic Evaluation Marianna Apidianaki editor Saif M Mohammad editor Jonathan May editor Ekaterina Shutova editor Steven Bethard editor Marine Carpuat editor Association for Computational Linguistics New Orleans, Louisiana conference publication liu-2018-emonlp 10.18653/v1/S18-1059 https://aclanthology.org/S18-1059/ 2018-06 390 394