A smiling boy goes down a brown slide.
The boy is riding a tractor.
Boy can either be going down a slide or riding a tractor
exists e2 e1 s1 x1 x2.(down(e2,x2) & n_slide(x2) & a_brown(s1) & Theme(s1,x2) & Actor(e2,x1) & v_go(e2) & n_boy(x1) & Actor(e1,x1) & v_smile(e1))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_tractor(x2))