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:
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