Anchor: A number of people are diving and swimming in a body of water.
Entailed: Group of people enjoying a summer day.
Contradiction: Group of kids riding down street on bikes.
Contradiction: The people are dancing
Contradiction: We thought about ways to improve upon our incorrect payment system. 
Contradiction: The couple is playing golf.
Contradiction: I don't know of any good World War or Vietnam books. My dad was a paratrooper.