Anchor: A man without a helmet is riding a red bike.
Entailed: The man is riding a bike.
Contradiction: The man is riding a skateboard.
Contradiction: The man without a helmet is riding a on a white scooter.
Contradiction: A doctor is talking with a patient in a clinic.
Contradiction: A woman wearing a helmet rides a blue bike.
Contradiction: A woman is sitting on her front porch.