Anchor: A dirt biker competes while onlookers watch.
Entailed: A dirt biker rides his dirt bike in front of a crowd.
Contradiction: A gymnast competes while onlookers watch.
Contradiction: No one is jumping.
Contradiction: How does degree of injury/illness affect intervention 
Contradiction: Nothing for sale today at the market.
Contradiction: Loan guarantee does not include the insurance of withdrawable accounts in financial institutions.