Anchor: A swimmer in an indoor pool braces himself before hitting the water.
Entailed: A person is at the pool.
Contradiction: A man is watching ballet.
Contradiction: It would be more beneficial if it was in a different state.
Contradiction: Should the United States of America save for the older population?
Contradiction: I would never think about taking a course to learn how to change oil.
Contradiction: People are talking in a group.