Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: The bike the man is riding on the pier is not necessarily a rental.
 The question and answer:
Given the sentence "A man riding a bike on the pier." can we conclude that "A man is enjoying a bike rental from a pier vendor."?
Options:
- yes
- it is not possible to tell
- no
The answer is it is not possible to tell