premise1: The bike rider is wearing a silver helmet and red shirt.
premise2: Stop action frame of a racer in a bicycle race.
premise3: A man rides a bike through a course.
premise4: A guy on a BMX bike.
premise: The bike rider is wearing a silver helmet and red shirt. Stop action frame of a racer in a bicycle race. A man rides a bike through a course. A guy on a BMX bike.
hypothesis: A biker races.