Usage of Visual Analytics to Support Immigration-Related, Personalised Language Training Scenarios. - Gerasimos Antzoulatos; Thanassis Mavropoulos; Grigorios Tzionis; Anastasios Karakostas; Almudena Gonzalez Costas; Marta González Burgos; Stefanos Vrochidis; Ioannis Kompatsiaris (IMCL, 2021)