A worker in green rakes leaves on a sidewalk.
They are setting the leaves on fire.
A worker who rakes leaves cant be setting them on fire at same time
exists e1 s1 x1 x2 x3.(on(e1,x3) & n_sidewalk(x3) & Actor(e1,x1) & v_leave(e1) & in(x1,x2) & n_rake(x2) & a_green(s1) & Theme(s1,x2) & n_worker(x1))
exists e1 x1 x2.(n_leaf(x2) & on(e1,x1) & n_fire(x1) & Theme(e1,x2) & Actor(e1,x1) & v_set(e1) & n_thing(x1))