dogs playing
A big dog and a little dog play together.
It is not necessarily true one is big and one is little.
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_dog(x1))
exists s1 s2 s3 x1 x2 x3.(a_topic(s1) & subset_of(x2,s1) & r_together(x2) & n_play(x2) & of(x2,x3) & n_dog(x3) & a_little(s3) & Theme(s3,x2) & subset_of(x1,s1) & n_dog(x1) & a_big(s2) & Theme(s2,x1))