Anchor: Two teams are competing in a volleyball game.
Entailed: A group of people are playing volleyball.
Contradiction: The volleyball teams are having lunch.
Contradiction: The population doubled in the 1800s. 
Contradiction: A girl is going to class.
Contradiction: Three women are standing on a cliff overlooking mountains and the ocean.
Contradiction: Staff expertise needed to be frequently updated in the area of vulnerabilities and security monitoring tools.