Anchor: A person, crouching on a surfboard, is surfing in a body of water.
Entailed: A person is surfing.
Contradiction: A person is floating in the water.
Contradiction: People watching the skies for kites
Contradiction: The General Accounting office is part of Congress.
Contradiction: Two foreign women are talking outside a movie theater
Contradiction: Its difficult to say which post offices would be closing.