Anchor: The Postal Service could, for example, place a Roman numeral in front of each ZIP Code, yielding a code like I-20878-2619.
Entailed: The postal service could put a roman numeral in front of zip codes
Contradiction: The postal service cannot use roman numerals
Contradiction: Two men are fighting.
Contradiction: Baseball players are practicing.
Contradiction: The little girl is at a ballet recital.
Contradiction: People are outside.