Anchor: Two young boys in sports t-shirts are walking in a crowd.
Entailed: Two boys are in a crowd.
Contradiction: Two boys in t-shirts are riding bicycles  in a crowd.
Contradiction: the people are underground in a mineshaft
Contradiction: They can bring their prescriptions in. 
Contradiction: A man in a blue vest directs cats.
Contradiction: Two young boys hide in the woods while one looks scared