Someone refers to the young boy and the throwing of something refers to the rock.is the reasoning for what question and answer pair?

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 young boy in a swimsuit throws a rock into the water." is it true that "Someone is throwing something."?
A: yes