Bob is red. Dave is white. Erin is red. Erin is round. Erin is young. Fiona is red. Fiona is white. All nice things are green. All blue things are round. If something is red then it is nice. Green things are blue. If Dave is white then Dave is not young. If Fiona is nice and Fiona is round then Fiona is young. If something is white and nice then it is red. If Bob is red then Bob is not white. If something is not young then it is round.
Bob is nice.