A limousine in front of a group of people on steps.
Some people and a limo.
people and a limo are  front of  limousine   steps
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 s1 x1 x2.(a_topic(s1) & subset_of(x2,s1) & n_limo(x2) & subset_of(x1,s1) & n_people(x1))