CMB AI Lab at SemEval-2022 Task 11: A Two-Stage Approach for Complex Named Entity Recognition via Span Boundary Detection and Span Classification Keyu Pu author Hongyi Liu author Yixiao Yang author Jiangzhou Ji author Wenyi Lv author Yaohan He author 2022-07 text Proceedings of the 16th International Workshop on Semantic Evaluation (SemEval-2022) Guy Emerson editor Natalie Schluter editor Gabriel Stanovsky editor Ritesh Kumar editor Alexis Palmer editor Nathan Schneider editor Siddharth Singh editor Shyam Ratan editor Association for Computational Linguistics Seattle, United States conference publication pu-etal-2022-cmb 10.18653/v1/2022.semeval-1.221 https://aclanthology.org/2022.semeval-1.221/ 2022-07 1603 1607