Anchor: Two girls watch two boys who are using sewing machines.
Entailed: Some girls observe a couple of boys sewing with machines.
Contradiction: Two boys watch two girls sew seams with a machine.
Contradiction: The expected the guys to do it without giving them the necessary materials to do it.
Contradiction: It's clear that any additional demand can be met by using 2-3 years of preparation time.
Contradiction: Case doesn't care who wins this election.
Contradiction: A man is wearing blue.