LWDA 2021: Lernen, Wissen, Daten, Analysen 2021: proceedings of the LWDA 2021 workshops: FGWM, KDML, FGWI-BIA, and FGIR : online, September 1-3, 2021 - Seidl, Thomas; Fromm, Michael; Obermeier, Sandra (CEUR workshop proceedings, 2021)