Q: "A large group of swimmers entering the water." Does this mean that "Some swimmers are competing in a race."?
A: it is not possible to tell

Q: "a woman is showing two children something." Does this mean that "There are three adults talking to each other."?
A: no

Q: "Three sisters on a beach overlooking the ocean in pink dresses." Does this mean that "The sisters are jumping into the water."?
A: no

Q: "A boy performs a skateboard trick in a parking lot." Does this mean that "A boy performs an advance skateboard trick"?
A:
it is not possible to tell