Anne is green. Anne is quiet. Anne is smart. Anne is young. Dave is not round. Dave is not smart. Dave is white. Fiona is quiet. Fiona is red. Fiona is round. Fiona is not smart. Fiona is not white. Fiona is not young. Gary is quiet. Gary is not round. Gary is smart. If something is white then it is quiet. If Anne is smart then Anne is white. Round, white things are not young.
Gary is not green.