Anchor: U.S. workers are unavailable, must notadversely affect the wages and working conditions of U.S. workers.
Entailed: U.S. workers cannot affect the wages and working conditions of U.S. workers.
Contradiction: U.S. workers can affect the wages and working conditions of their employers or employees.
Contradiction: A large man singing.
Contradiction: A little girl was yelling on the floor
Contradiction: The western compound is before the guardian kings. 
Contradiction: I don't read the news much.