Artificial Intelligence for Knowledge Management 8th IFIP WG 12.6 International Workshop, AI4KM 2021, Held at IJCAI 2020, Yokohama, Japan, January 7–8, 2021, Revised Selected Papers - Mercier-Laurent, Eunika; Kayalica, M. Özgür; Owoc, Mieczyslaw Lech (Springer International Publishing, 2021)