Anchor: A skateboarder rides down a city street.
Entailed: A skateboarder rides in the city.
Contradiction: A cyclist rides in a city street race.
Contradiction: I have won a lot of radio station contests.
Contradiction: The Administrator can require allowance be held.
Contradiction: Osama Bin Laden is leading the manhunt for the African bombings. 
Contradiction: "Alfred darling" was the descriptor the woman used for him.