Anchor: they had mashed potatoes they had French fries and they had au gratin
Entailed: They had mashed potatoes, French fries and au gratin.
Contradiction: They didn't have mashed potatoes, French fries or au gratin.
Contradiction: Oh Shrek!
Contradiction: A rider rides a horse.
Contradiction: A boy stares into a mirror while his father watches.
Contradiction: The man are walking down the street.