A driver is operating a street car.
he is working in san fransisco
The fact that a driver is operating a street car doesn't imply that he is operating in san fransisco.
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 s1 x1.(in(e1,x1) & n_fransisco(x1) & a_san(s1) & Theme(s1,x1) & Actor(e1,x1) & v_work(e1) & n_male(x1))