The isolines image of the baseline accuracy delivers a good representation of domain relations.
we can observe two regions with the highest accuracy (EL-KI, KI-EL) and (BO-DV, DV-BO) and two regions with a big performance drop (EL-BO, EL-DV, KI-BO, KI-DV) and (BO-EL, BO-KI, DV-EL, DV-KI).