Dave is not furry. Dave is green. Dave is nice. Dave is rough. Dave is round. Dave is smart. Dave is not young. Harry is furry. Harry is green. Harry is not nice. Harry is rough. Harry is round. Harry is smart. Harry is young. If Dave is green and Dave is not rough then Dave is not round. If Dave is young and Dave is furry then Dave is green. If someone is smart then they are green.
Harry is young.