A man is skateboarding in a park, and he is on a wall, and there are other skateboarders in the background.
Men slept in the park
If there are skateboarders in the background then by definition they could not have slept.
exists e1 p1 p2 x1 x2 x3 x6 x7.(n_background(x7) & n_skateboarder(x6) & exists x5.((x3 = x5) & in(x5,x7) & -(x5 = x6) & n_skateboarder(x5)) & exists x4.(on(x1,x4) & n_wall(x4)) & n_male(x1) & in(e1,x2) & n_park(x2) & Actor(e1,x1) & v_skateboard(e1) & n_man(x1))
exists e1 x1 x2.(n_park(x2) & ne_nam_men(x1) & in(e1,x2) & Actor(e1,x1) & v_sleep(e1))