Anchor: Four players on a soccer team stand on a field while one of them holds the yellow ball and talks to the referee.
Entailed: The ball is yellow.
Contradiction: Four soccer players walking down the street with a football.
Contradiction: Four players are eating dinner out at a bar.
Contradiction: There is no referee on the field.
Contradiction: The ball is blue.
Contradiction: A man shops at wal-mart.