A boy on the street holds a box.
The boy is driving a car
If you're a boy on the street, you cannot be driving a car at the same time.
exists e1 x1 x2 x3.(n_street(x2) & Theme(e1,x3) & Actor(e1,x1) & v_hold(e1) & n_box(x3) & on(x1,x2) & n_boy(x1))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_car(x2))