A baby and a young boy playing.
A child and a dog are having fun.
The baby playing may not be a dog.
exists s1 s2 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & n_playing(x2) & of(x2,x3) & n_boy(x3) & a_young(s2) & Theme(s2,x2) & subset_of(x1,s1) & n_baby(x1))
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_have(e1) & n_fun(x4) & subset_of(x3,x1) & n_dog(x3) & subset_of(x2,x1) & n_child(x2))