Anchor: Two skateboarders walking down a street filled with no parking sings.
Entailed: Two skateboarders were singing while walking down the street.
Contradiction: Five hikers went hiking.
Contradiction: It's not possible for those with limited time to go see the high mountains at sunset.
Contradiction: A dog sits on a pier.
Contradiction: 'It is best you kill me now,' I told them.
Contradiction: A surfer on a big wave.