A man stands in the street.
a man in the street
there is a man who is is standing in the street.
exists e1 x1 x2.(n_street(x2) & in(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_man(x1))
exists x1 x2.(n_street(x2) & a_topic(x1) & in(x1,x2) & n_man(x1))