A woman in a dark jacket sitting n a bus.
The woman is not on the bus.
The woman is either sitting n a bus or not on the bus, not both.
exists x1.(all x2.(n_bus(x2) -> exists e1 s1 x3 x4.(a_topic(x1) & in(x1,x3) & for(x3,x2) & n_n(x3) & Actor(e1,x3) & v_sit(e1) & of(x3,x4) & n_jacket(x4) & a_dark(s1) & Theme(s1,x3))) & n_woman(x1))
exists x1 x2.(n_bus(x2) & n_woman(x1) & -exists p1.on(x1,x2))