Please answer the following question by reasoning step-by-step. If "An older man wearing a hat is building a sand-castle on a public beach." does that mean that "The old man is on the beach."?
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
In order to build a sand-castle one needs to be on the beach. So the answer is yes.