Anchor: Two girls in white shirts and blue jean shorts walking through a group of people with umbrellas in the background.
Entailed: Two girls are walking.
Contradiction: Two girls are riding bikes.
Contradiction: A man is running down the block.
Contradiction: It is expensive to send unauthorized mail through the postal service. 
Contradiction: Two girls in bikinis mud wrestle in a bar.
Contradiction: The people are holding signs in promotion of something.