Anchor: Four students are sitting on the floor by a model volcano.
Entailed: Four students are sitting together.
Contradiction: Eight students are sitting near a model train.
Contradiction: There were 1.5 billion pieces in 1990.
Contradiction: Someone reads nonfiction.
Contradiction: a man eats his food sitting on a ground
Contradiction: A man jumps into the air high over an evergreen valley.