def convert_cases(case):
    """
    Converts cases as found on Wikidata to more succinct versions.
    """
    case = case.split(" case")[0]
    if case in ["accusative", "Q146078"]:
        return "Acc"
    elif case in ["dative", "Q145599"]:
        return "Dat"
    elif case in ["genitive", "Q146233"]:
        return "Gen"
    else:
        return ""