Anne is nice. Anne is quiet. Anne is red. Anne is round. Dave is not green. Dave is nice. Dave is quiet. Dave is round. Erin is not young. Fiona is green. Fiona is nice. Fiona is not young. If Fiona is young then Fiona is quiet. All young, blue people are not nice. If Anne is not red and Anne is not round then Anne is not blue. If someone is not red then they are nice. Young, blue people are quiet. If someone is not quiet then they are green.
Erin is blue.