An old man cleaning trash on the street.
A man cleaning.
It was an old man that was cleaning trash on a street.
exists e1 s1 x1 x2 x3 x4.(n_street(x4) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_clean(e1) & on(x3,x4) & n_trash(x3) & (x1 = x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists x1 x2.(a_topic(x1) & n_cleaning(x1) & of(x1,x2) & n_man(x2))