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# coding=utf-8 id = 131 group = 'sets' number = 38 visible = True facts = None solution = '''\ memb131(X, [X|_]). memb131(X, [_|T]) :- memb131(X, T). is_superset(_, []). is_superset(S1, [H|T]) :- memb131(H, S1), is_superset(S1, T). '''