Please answer the following question by reasoning step-by-step. If "Big brother shows his sister how to play a game in the backyard in the afternoon." does that mean that "The brother plays with the sister."?
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
Just because big brother shows his sister how to play a game does not mean that the brother plays with the sister. So the answer is it is not possible to tell.