Overview of Argumentative Text Understanding for AI Debater Challenge. - Jian Yuan; Liying Cheng; Ruidan He; Yinzi Li; Lidong Bing; Zhongyu Wei; Qin Liu 010; Chenhui Shen; Shuonan Zhang; Changlong Sun; Luo Si; Changjian Jiang; et al. (NLPCC (2), 2021)