Anchor: Three adults playing ice hockey in a stadium.
Entailed: People are playing hockey.
Contradiction: People are sledding down a hill.
Contradiction: A couple are crossing a river by canoe.
Contradiction: There are multiple people present.
Contradiction: There is not a book named Roger S. Pressman, Software A Practitioner's Approach, 3rd ed..
Contradiction: Some pedestrians are in the road.