The girl is sliding down a green slide.
The girl is waiting for a bus.
The girl cannot be waiting for a bus if she is sliding down a slide
exists e1 s1 s2 x1 x2.(n_girl(x1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_slide(e1) & n_slide(x2) & a_green(s1) & Theme(s1,x2))
exists e1 x1 x2.(n_girl(x1) & for(e1,x2) & n_bus(x2) & Actor(e1,x1) & v_wait(e1))