A boy wearing all black is sliding down a blow up yellow slide.
A boy jumps in the pool.
Sliding down a slide can't happen while jumping into a pool. They're two different actions.
exists e1 s1 s2 x1 x2 x3 x4.(up(e1,x4) & n_slide(x4) & a_yellow(s2) & Theme(s2,x4) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_slide(e1) & n_blow(x3) & all x5.(n_black(x5) -> exists e2.(Theme(e2,x5) & Actor(e2,x2) & v_wear(e2))) & (x1 = x2) & n_boy(x1))
exists e1 x1 x2.(n_pool(x2) & in(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_boy(x1))