LasUIE: Unifying Information Extraction with Latent Adaptive Structure-aware Generative Language Model - Fei, Hao; Wu, Shengqiong; Li, Jingye; Li, Bobo; Li, Fei; Qin, Libo; Zhang, Meishan; Zhang, Min; Chua, Tat-Seng (Advances in Neural Information Processing Systems, 2022)