Children swimming in brown riverwater.
There are boys swimming in brown riverwater.
The children are not necessarily boys
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_riverwater(x3) & a_brown(s1) & Theme(s1,x3) & n_swimming(x1) & (x1 = x2) & ne_nam_children(x2))
exists p1 x1 e1 s1 x2 x3 x4.((x1 = x2) & in(e1,x4) & n_riverwater(x4) & a_brown(s1) & Theme(s1,x4) & Actor(e1,x3) & v_swim(e1) & (x2 = x3) & n_boy(x2))