Anchor: Two white guys are playing video games in their dorm.
Entailed: Two guys playing games at college.
Contradiction: The two black guys are playing video games at a store.
Contradiction: The United States has enough power plants to last for the foreseeable future.
Contradiction: A woman is jumping.
Contradiction: A man videotaped a door in San Remo.
Contradiction: There is a mallard duck.