A girl slides on a red slide
The girl is sliding.
Both sentence are talking about girl sliding
exists e1 s1 x1 x2.(on(e1,x2) & n_slide(x2) & a_red(s1) & Theme(s1,x2) & Actor(e1,x1) & v_slide(e1) & n_girl(x1))
exists e1 x1.(n_girl(x1) & Actor(e1,x1) & v_slide(e1))