Anchor: A crashing blow descended on his head, and all was darkness.
Entailed: He lost consciousness after being hit on the head.
Contradiction: The blow missed his head and hit his shoulder.
Contradiction: The people at the train station are waiting for a plane.
Contradiction: The agency procurement request shows names and experience of project officials.
Contradiction: City-states shrank into irrelevance across the Greek mainland.
Contradiction: A boy with a  backpack walking along a trail.