A limousine in front of a group of people on steps.
A van drives down the street.
A limousine is a different vehicle than a van.
exists x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & on(x2,x5) & n_step(x5) & of(x2,x3) & of(x3,x4) & n_people(x4) & n_group(x3) & n_front(x2) & n_limousine(x1))
exists x1 x2 x3.(n_street(x3) & a_topic(x1) & down(x1,x3) & n_drive(x1) & of(x1,x2) & n_van(x2))