Anchor: A boy and girl are standing together, and the girl is holding a volleyball.
Entailed: A boy and girl are together.
Contradiction: A boy and girl are sitting in class.
Contradiction: By dinnertime, Mrs Chatterbox and her children were wishing for Chatterbox to leave.
Contradiction: Adults are watching young people play a game.
Contradiction: The scenery in the mountain is spoiled. 
Contradiction: People are at a wedding.