Anchor: You hang up to avoid a Belgacom charge, and the computer calls you back, providing you with a stateside dial tone so you can dial as if you were in the United States.
Entailed: The computer calls you back after you hang up to avoid a charge.
Contradiction: You never hung up and you received a charge for your actions. 
Contradiction: You will be charged a Belgacom fee, even if you hang up.
Contradiction: Even if you hang up you cannot avoid a Belgacom charge.
Contradiction: A boy is in a black shirt
Contradiction: The man is outsidel