Alan is green. Bob is red. Bob is kind. Bob is cold. Bob is blue. Bob is big. Dave is young. Fred is young. Fred is green. If someone is big and kind then they are young. If someone is round and rough then they are cold. If someone is red and rough and blue then they are nice. If someone is blue and big then they are round. If someone is big and round then they are rough. If someone is blue and red and young then they are rough.
Dave is not young.