A homeless man in an alley.
A man on a street.
homeless man in an alley is same as man on a street.
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_alley(x2) & n_man(x1) & a_homeless(s1) & Theme(s1,x1))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_street(x2) & n_man(x1))