Anchor: A group of young men playing basketball; two members of the same team trying to block a player on the other team who has the ball.
Entailed: There is a group of human beings with a basketball.
Contradiction: A group of young men are sleeping.
Contradiction: The PAC-3 program is absolutely flawless as exemplified by the seeker subsystem.
Contradiction: The woman is walking the dog
Contradiction: The man was eating by himself.
Contradiction: He states who are these people?