Anchor: The security guard is smiling.
Entailed: There is a security guard that is smiling.
Contradiction: The security guard is yelling.
Contradiction: Security guards are never bribed.
Contradiction: A security guard is sleeping on the job.
Contradiction: The security guard is scowling at the bank robbers he has caught trying to get into the elevator shafts of the building
Contradiction: The security guard flying in the air.