Leo: Given the sentence "Two boys having fun throwing rocks into the pond." is it true that "Two boy sare throwing rocks in a pond."?
Mei: OK, So, let's think first...
Me:

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
Throwing rocks into a pond is the same as throwing rocks in a pond.
Thus, the answer is yes.