Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: A worker who sweeps the road doesn't necessary imply after a snowstorm.
 The question and answer:
Can we conclude from "A worker sweeps the road as a machine drives in front of him." that "A person sweeps the road after a snowstorm."?
Options:
- yes
- no
- it is not possible to tell
The answer is it is not possible to tell