Anchor: a mountain biker is riding on a marked out competition trail in the woods.
Entailed: A mountain biker races through the woods.
Contradiction: A man watches other people ride bikes because he is lazy.
Contradiction: Three men ignored the new arrival and stared into the group.
Contradiction: A shitrless man is outdoors.
Contradiction: The girl is in shop class building a bird house
Contradiction: There are birds gliding