A man operating a trolley car.
Man operates trolley car downtown for historic ride.
Operating a trolley car does not imply it is downtown or that it's for a historic ride.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_operate(e1) & n_car(x3) & of(x3,x4) & n_trolley(x4) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2 x3 x4 x5.(ne_nam_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_operate(e1) & for(x2,x5) & n_ride(x5) & a_historic(s1) & Theme(s1,x5) & n_downtown(x2) & of(x2,x4) & n_car(x4) & of(x2,x3) & n_trolley(x3))