Anchor: A person hits a ball with a tennis racket.
Entailed: The man is on a tennis court.
Contradiction: The man is on his couch.
Contradiction: We're transferring from London to Paris, France and it is taking a couple weeks to get a response. 
Contradiction: The woman is not standing up.
Contradiction: The frisbee hit the man on the head.
Contradiction: A man is cleaning the floor.