The girl is sliding down a green slide.
The girls parents are waiting at the end of the slide.
You can not infer they are waiting.
exists e1 s1 s2 x1 x2.(n_girl(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1) & n_slide(x2) & a_green(s1) & Theme(s1,x2))
exists e1 x1 x2 x3 x4.(n_slide(x4) & n_end(x3) & n_parent(x1) & of(x1,x2) & n_girl(x2) & at(e1,x3) & of(x3,x4) & Actor(e1,x1) & v_wait(e1))