A young child swims with a paddle board in a pool while wearing a yellow flotation device.
A youngster is in a swimming pool.
"A youngster" is a rephrasing of "a young child."
(x)
exists p1 x1.(exists x2 x3.(in(x1,x2) & n_pool(x2) & of(x2,x3) & n_swimming(x3)) & n_youngster(x1))