a man a woman and a child sitting on a couch smiling
A family sits on a couch.
It cannot be inferred that they are a family.
exists e1 e2 s1 x1 x2 x3.(a_topic(s1) & subset_of(x1,s1) & for(e1,e2) & Actor(e2,x2) & v_smile(e2) & on(e1,x3) & n_couch(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_child(x1) & all x4.(n_woman(x4) -> exists x5.(subset_of(x5,s1) & for(x5,x4) & n_man(x5))))
exists e1 x1 x2.(on(e1,x2) & n_couch(x2) & Actor(e1,x1) & v_sit(e1) & n_family(x1))