Boy sliding down a slide on his knees.
A boy sliding down a slide.
The boy is sliding down a slide because he is sliding down a slide on his knees.
exists e1 s1 x1 x2 x3.(ne_nam_boy(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1) & on(x2,x3) & n_knee(x3) & of(x3,x2) & n_male(x2) & n_slide(x2))
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_slide(e1) & n_slide(x3) & (x1 = x2) & n_boy(x1))