A woman is working on the computer.
A car on the highway
There can either be a woman or a car.
exists e1 x1 x2.(n_computer(x2) & on(e1,x2) & Actor(e1,x1) & v_work(e1) & n_woman(x1))
exists x1 x2.(n_highway(x2) & a_topic(x1) & on(x1,x2) & n_car(x1))