Anchor: and then what is the long-term effect of us burying that in the ground if that stuff
Entailed: I worry about possible harmful effects from burying that in the ground.
Contradiction: That stuff is perfectly safe, I have no concerns at all about it.
Contradiction: The boys are swimming.
Contradiction: Pictures are at an art exhibit.
Contradiction: He tapped his foot impatiently as he chopped the coriander. 
Contradiction: A boy is sliding into base during a game.