Wearing a maintenance vest on the subway does not mean the man is doing maintenance at that time. He could be a maintenance man on his way home from work or on his way to work or on his way anywhere.


Context: "A man who is wearing a maintenance vest is on a subway or train looking up at the closed doors." Claim: "A man who is wearing a vest is doing maintenance on a subway."
Considering the context, is the claim true, false, or unknown?