premise1: A snowboarder rides a rail on the cement handrail of steps with snow all around.
premise2: In the snow a person on a board traverses down a concrete wall beside bleachers.
premise3: A snowboarder is grinding down a long concrete rail.
premise4: A person doing a trick on a snowboard.
premise: A snowboarder rides a rail on the cement handrail of steps with snow all around. In the snow a person on a board traverses down a concrete wall beside bleachers. A snowboarder is grinding down a long concrete rail. A person doing a trick on a snowboard.
hypothesis: Snowboarder flies.