Anchor: A boy and a girl chatting at a table in a high school library
Entailed: A boy and girl are talking in the high school library
Contradiction: A boy and girl are yelling at each other
Contradiction: I asked right away. 
Contradiction: I had been teaching for enough time that I didn't have to take any other exit tests.
Contradiction: You have to worry about this right now, there will be no time for it later.
Contradiction: A woman is smoking a cigarette.