Dave is blue. Dave is green. Dave is kind. Dave is quiet. Dave is smart. Dave is not white. Dave is young. Erin is blue. Erin is green. Erin is kind. Erin is quiet. Erin is smart. Erin is not white. Erin is not young. If something is not kind and not green then it is not young. If Dave is smart and Dave is not green then Dave is young.
Erin is young.