supertype(animal,mammal).
supertype(mammal,dog).
supertype(mammal,cat).
supertype(bird,robin).
supertype(mammal,horse).
supertype(animal,bird).
supertype(flower,rose).
supertype(bird,penguin).
supertype(tree,pine).
supertype(tree,willow).
supertype(animal,reptile).
supertype(plant,cactus).