A Semi-supervised Multi-task Learning Approach to Classify Customer Contact Intents Li Dong author Matthew C Spencer author Amir Biagi author 2021-08 text Proceedings of the 4th Workshop on e-Commerce and NLP Shervin Malmasi editor Surya Kallumadi editor Nicola Ueffing editor Oleg Rokhlenko editor Eugene Agichtein editor Ido Guy editor Association for Computational Linguistics Online conference publication dong-etal-2021-semi 10.18653/v1/2021.ecnlp-1.7 https://aclanthology.org/2021.ecnlp-1.7/ 2021-08 49 57