Anchor: A tall white dog sits and watches a small black dog run around him in the snow.
Entailed: A small black dog runs circles in the snow around a sitting tall white dog.
Contradiction: Two dogs sleep in the snow.
Contradiction: Two young boys dive off the diving board.
Contradiction: Humans on a street
Contradiction: No, I don't agree with that.
Contradiction: The mail system was even more crucial than trade.