KACC: A Multi-task Benchmark for Knowledge Abstraction, Concretization and Completion. - Jie Zhou 016; Shengding Hu; Xin Lv; Cheng Yang 002; Zhiyuan Liu 001; Wei Xu 034; Jie Jiang; Juanzi Li; Maosong Sun 001 (ACL/IJCNLP (Findings), 2021)