Anchor: Three children are practicing a karate maneuver.
Entailed: Children practicing karate.
Contradiction: Three children are playing with a hula hoop.
Contradiction: A walrus attacks three kids and eats them.
Contradiction: A bird bathes in the stream.
Contradiction: Universal service was written into the Constituation, which is why both FedEx and the USPS provide it. 
Contradiction: The men are playing a sport.