Stream of consciousness rationale: A brown dog is digging with a brown collar digs sand.
The question and answer pair are described below.

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.
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Q: Given the sentence "A brown dog with a brown collar digs sand." is it true that "A dog is digging."?
A: yes