Toddler playing at the park.
The child is on the slide.
The park has a slide.
exists x1 x2 x3.(n_park(x3) & a_topic(x1) & at(x1,x3) & n_playing(x1) & (x1 = x2) & ne_nam_toddler(x2))
exists p1 x1 x2.(n_slide(x2) & n_child(x1) & on(x1,x2))