Please answer the following question by reasoning step-by-step. If "A man in a black sweater is walking along a railroad track." does that mean that "A technician is maintaining the tracks."?
Options:
- yes
- it is not possible to tell
- no. Step-by-step reasoning:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Men garbed in black sweaters are not all technicians. Not all men walking along tracks are maintaining them. So the answer is it is not possible to tell.