Anchor: A crowd of people watching a football game with a player wearing red and cheerleaders also wearing red.
Entailed: There are cheerleaders watching the football game.
Contradiction: The football game is being watched by no one.
Contradiction: I know some people who electronically grafted each other. 
Contradiction: A woman is riding a bike.
Contradiction: I am lucky that I do not have any kids.
Contradiction: Ca'daan noticed the sword mastery of the men.