Anchor: Eleven green and black uniformed boys sitting in a circle in one part of a gym with a man in the middle.
Entailed: Eleven boys are indoors in a gym
Contradiction: Eleven boys are swimming
Contradiction: I don't recall a time when they ever paid people to bring tires in. 
Contradiction: The bangle is the most important piece of jewelry in India.
Contradiction: We learned everything there was to learn.
Contradiction: She was suspicious of Poirot.