Anchor: Two girls are riding a 4 wheeler.
Entailed: There are at least 2 girls riding transportation.
Contradiction: The two girls are riding horses.
Contradiction: The Commission certified to OMB thought they were not compliant with 44 U.S.C.
Contradiction: Readiness to change and recognition of negative consequences to a behavior may be linked. 
Contradiction: A woman and man are sleeping at their house.
Contradiction: A person holds a ball.