A homeless man living on the street
A man is sitting on a couch.
The man cannot be homeless and sitting on a couch at the same time.
exists e1 s1 x1 x2 x3.(n_street(x3) & a_topic(x1) & on(e1,x3) & Actor(e1,x2) & v_live(e1) & (x1 = x2) & n_man(x1) & a_homeless(s1) & Theme(s1,x1))
exists e1 x1 x2.(on(e1,x2) & n_couch(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))