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)