Anchor: A man on a motorcycle is towing a bicyclist on his bicycle behind him.
Entailed: A man is on a motorcycle.
Contradiction: A woman on a motorcycle is racing beside a man on a bicycle.
Contradiction: There are no other alternatives when it comes to dealing with the retrofitting issue. 
Contradiction: Cubans used improvised rafts to try to get Florida.
Contradiction: You don't know what I just asked you?
Contradiction: The union was on the side.