A small white dog running.
A chihuahua is running.
You can not infer the dog is a chihuahua.
exists s1 s2 x1 x2.(a_topic(x1) & n_running(x1) & of(x1,x2) & n_dog(x2) & a_white(s2) & Theme(s2,x1) & a_small(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_run(e1) & n_chihuahua(x1))