Data Augmentation for Low-Resource Named Entity Recognition Using Backtranslation Usama Yaseen author Stefan Langer author 2021-12 text Proceedings of the 18th International Conference on Natural Language Processing (ICON) Sivaji Bandyopadhyay editor Sobha Lalitha Devi editor Pushpak Bhattacharyya editor NLP Association of India (NLPAI) National Institute of Technology Silchar, Silchar, India conference publication yaseen-langer-2021-data https://aclanthology.org/2021.icon-main.43/ 2021-12 352 358