A man is sledding on an orange slide.
a slide is being used
Sledding on a slide implies the slide is being used
exists e1 x1 x2 x3.(on(e1,x2) & n_slide(x2) & of(x2,x3) & n_orange(x3) & Actor(e1,x1) & v_sled(e1) & n_man(x1))
exists e1 x1.(Theme(e1,x1) & v_use(e1) & n_slide(x1))