Anchor: yeah i cracked a collarbone separated the shoulder a little bit
Entailed: Yes, I separated my shoulder a little and cracked a collarbone. 
Contradiction: I've never had any kind of injury. 
Contradiction: This won't allow the carrier to put mail in the box directly from the vehicle.
Contradiction: People are in a raft.
Contradiction: No one playing the football in the field.
Contradiction: a clown entertains a crowd