Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: A dog rolling in the grass does not necessarily imply that it is on a summer day.
 The question and answer:

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
Given the sentence "A dog rolls on his back in the grass." can we conclude that "A dog is playing in the grass on a warm summer day."?
Options:
- yes
- it is not possible to tell
- no
The answer is it is not possible to tell