Sentence 1: A man on a dirt bike zipping away while another one slips to the ground and a third man in a yellow jacket looks on. Sentence 2: A man is racing in a dirt bike competition.


Context: "A man on a dirt bike zipping away while another one slips to the ground and a third man in a yellow jacket looks on." Claim: "A man is racing in a  dirt bike competition."
Considering the context, is the claim true, false, or unknown?