Mitigating Temporal-Drift: A Simple Approach to Keep NER Models Crisp Shuguang Chen author Leonardo Neves author Thamar Solorio author 2021-06 text Proceedings of the Ninth International Workshop on Natural Language Processing for Social Media Lun-Wei Ku editor Cheng-Te Li editor Association for Computational Linguistics Online conference publication chen-etal-2021-mitigating 10.18653/v1/2021.socialnlp-1.14 https://aclanthology.org/2021.socialnlp-1.14/ 2021-06 163 169