premise1: The skateboarder in the white t-shirt is riding on a wooden ramp.
premise2: A skateboarder hits a curve at the top of the skate park.
premise3: The man in a white shirt is skateboarding.
premise4: A man is skateboarding up a ramp.
premise: The skateboarder in the white t-shirt is riding on a wooden ramp. A skateboarder hits a curve at the top of the skate park. The man in a white shirt is skateboarding. A man is skateboarding up a ramp.
hypothesis: A man standing.