Anchor: A dog jumps to catch a ball in a large field.
Entailed: A dog is playing fetch outside.
Contradiction: A dog is sleeping in a bed.
Contradiction: I am not asking if you can believe this.  
Contradiction: Multiple people prop up an Elmo float through the streets for a parade
Contradiction: We had failed to uphold the law.
Contradiction: The House speaker said there was a billion dollar shortfall.