Anchor: One student argues with another over an assignment.
Entailed: A student argues with another student over an assignment.
Contradiction: Two students argue with another over an assignment.
Contradiction: Hong Kong has no relation to any of the Asian nations.
Contradiction: The building used to store water.
Contradiction: Two kids color on the wall of their house.
Contradiction: A long time ago, I got a story about Iran-Contra from a young free-lancer and it was filled with anonymous sources.