Anchor: Two young boys are outside talking and are n't wearing shirts.
Entailed: Two boys talking to each other.
Contradiction: Two boys with shirts on minding their own business.
Contradiction: There has been no economic growth for the past three years in South Africa.  
Contradiction: The museum has lots of different attractions in it.
Contradiction: I know for a fact that that's not true.
Contradiction: Humans painting.