Anchor: A small child, wearing a helmet, is riding a BMX bike on a dirt path.
Entailed: child riding a bike, wearing a helmet
Contradiction: girl plays with dolls in the yard
Contradiction: A kid is ice skating.
Contradiction: Nema avoided answering his question. 
Contradiction: A considerable body of federal guidance on information security was just removed.
Contradiction: The dog is using its rear legs.