Anchor: A child attempts to enter a house through the doggy door.
Entailed: There is a child trying to get into a house
Contradiction: There is a child exiting the house
Contradiction: the birds were short necked
Contradiction: There is no place for dogma in scientific analysis. 
Contradiction: Two people waiting for their parents to pick them up from soccer practice.
Contradiction: Training and revisions were made to improve the system.