Anchor: The surfer lost his board and is about to fall into the sea.
Entailed: A surfer is going to get wet.
Contradiction: A shark is graduating from college.
Contradiction: A man is on the bus.
Contradiction: The eight travelers sat in silence
Contradiction: Picasso resided in Spain until he moved his studio to the United States, choosing never to visit the rest of Europe. 
Contradiction: The term solo parents is increasingly being used.