Anchor: As federal employees, postal workers are not allowed to strike and, if a negotiated settlement cannot be reached, contractual disputes are resolved by binding arbitration.
Entailed: Disputes that arise in postal workers are solved through binding arbitration.
Contradiction: Postal workers are allowed to strike. 
Contradiction: I didn't do the usual.
Contradiction: The girls have legs.
Contradiction: A man is giving his order to a waiter.
Contradiction: The children in who are accompanied by an adult are on a field trip.