Anchor: Three girls are horseback riding with the focus on the youngest girl.
Entailed: There are three horses with people riding them.
Contradiction: The focus is on the oldest girl.
Contradiction: I thought that thing didn't pass.
Contradiction: The fetuses are most vulnerable to the methylmercury.
Contradiction: The dog is sleeping in the dog house.
Contradiction: The readers gain a better understanding of the world from this.