Dave is red. Dave is young. Erin is furry. Erin is nice. Erin is red. Fiona is blue. Fiona is furry. Fiona is nice. Fiona is quiet. Fiona is red. Fiona is round. Fiona is young. Harry is blue. Harry is furry. Harry is quiet. Harry is red. If Erin is nice and Erin is quiet then Erin is round. If Erin is red then Erin is quiet.
Erin is not round.