Anchor: Two men fighting at an MMA event.
Entailed: George and Bill were fighting at the MMA event.
Contradiction: Two ladies were drinking tea.
Contradiction: A blond haired woman is sleeping.
Contradiction: The Postal Service doesn't charge. 
Contradiction: Kashmiri merchants are well-known for their honesty and forthrightness.
Contradiction: Some people didn't think Andy truly had lung cancer.