A boy goes down a slide.
a boy is on the slide because it's his favorite thing at the park
A boy can go down a slide even if it's not his favorite thing at the park
exists e1 s1 x1 x2.(a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_go(e1) & n_slide(x2) & n_boy(x1))
exists p1 p2 s1 x1 x2 x3 x4.(n_park(x4) & n_thing(x3) & a_favorite(s1) & Theme(s1,x3) & of(x3,x2) & n_male(x2) & n_thing(x2) & n_slide(x2) & exists p3.((x2 = x3) & at(x3,x4)) & because(p1,p2) & on(x1,x2) & n_boy(x1))