Anne is not green. Anne is rough. Anne is round. Anne is smart. Anne is white. Anne is young. Dave is green. Dave is quiet. Dave is rough. Dave is smart. Dave is not white. Fiona is green. Fiona is quiet. Fiona is round. Fiona is not white. Fiona is young. If something is smart and not round then it is not white. All white, green things are smart. All white, round things are not quiet. If something is not young then it is quiet. If Fiona is not young then Fiona is white. If something is not smart then it is not rough.
Dave is young.