Gradually Excavating External Knowledge for Implicit Complex Question Answering Chang Liu author Xiaoguang Li author Lifeng Shang author Xin Jiang author Qun Liu author Edmund Lam author Ngai Wong author 2023-12 text Findings of the Association for Computational Linguistics: EMNLP 2023 Houda Bouamor editor Juan Pino editor Kalika Bali editor Association for Computational Linguistics Singapore conference publication liu-etal-2023-gradually 10.18653/v1/2023.findings-emnlp.961 https://aclanthology.org/2023.findings-emnlp.961/ 2023-12 14405 14417