ACTOR: Active Learning with Annotator-specific Classification Heads to Embrace Human Label Variation Xinpeng Wang author Barbara Plank author 2023-12 text Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing Houda Bouamor editor Juan Pino editor Kalika Bali editor Association for Computational Linguistics Singapore conference publication wang-plank-2023-actor 10.18653/v1/2023.emnlp-main.126 https://aclanthology.org/2023.emnlp-main.126/ 2023-12 2046 2052