Anchor: The ball boys are waiting on the side lines of the tennis court while they watch the lady hitting the ball.
Entailed: Ball boys wait for their turn to retrieve the balls during a tennis match.
Contradiction: The boys are hitting golf balls at a driving range.
Contradiction: The lady is waiting on the boys.
Contradiction: The ball boys are collecting balls that have rolled away.
Contradiction: Two boys are swimming in an ocean.
Contradiction: Ball boys drink gatorade during a break.