?ikes(mary,X).湩 或蕌 ?ikes(mary, musIc).湩 或 ? friend(x,Y).湩 或 ?ikes(bel, sports),蕌 ikes( mary, musIc),菖 friend john,X),潼?-likes(mary,X). 或 ?-likes(mary,music). 或 ?-friend(X,Y). 或 ?-likes(bell,sports), likes(mary,music), friend(john,X).