Anchor: A biker is riding down the stairs on his bike at night.
Entailed: A biker is riding his bike at night.
Contradiction: A runner is walking in the park during the day.
Contradiction: I know you don't worry about being told you're in the wrong place.
Contradiction: A man is standing.
Contradiction: The divers are in lava.
Contradiction: A girl playing a musical instrument.