A driver is operating a street car.
the street car is running
a driver running the car.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & n_car(x2) & of(x2,x3) & n_street(x3) & n_driver(x1))
exists e1 x1 x2.(n_car(x1) & of(x1,x2) & n_street(x2) & Actor(e1,x1) & v_run(e1))