Anchor: Two competitors ride their dirt bikes around the track, tied for the lead.
Entailed: They competed for the lead.
Contradiction: The competitors were disqualified from the race.
Contradiction: A man throws a stick for a dog to chase.
Contradiction: A unicyclist entertains the spectators.
Contradiction: The boys are driving a motorcycle at over 100 miles per hour.
Contradiction: The people are working in the woods.