People sitting on a brown leather couch.
People are on the balcony.
A leather couch would not be on a balcony.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_couch(x3) & of(x3,x4) & n_leather(x4) & a_brown(s1) & Theme(s1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_people(x1))
exists p1 x1 x2.(n_balcony(x2) & on(x1,x2) & n_people(x1))