Student: Given the sentence "A redheaded boy swimming underwater." is it true that "A person swimming with a friend underwater."?.
Teacher: Let's think:

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
The boy swimming is not implied to be swimming with his friend. So the final answer is it is not possible to tell.