Bob is quiet. Bob is young. Erin is green. Erin is red. Fiona is quiet. Fiona is young. Harry is blue. Blue, big people are green. If someone is young then they are big. Big people are blue. If someone is red and big then they are white. All white, green people are big. If someone is green and big then they are red. If someone is white and young then they are green. If Erin is white then Erin is young.
Fiona is not green.