Anchor: Young football players competing on the playing field.
Entailed: Children are having a sporting competition.
Contradiction: Small people pick up trash in a field.
Contradiction: Not playing at all.
Contradiction: It is the contrast between kid and adult entertainment that makes this endearing. 
Contradiction: A person is surfing in the ocean.
Contradiction: She's staying up late past her bedtime, so we can still talk with her.