A black dog runs and, focusing on something.
A big black dog runs and, focusing on something.
Not all dogs are big, the first statement could easily refer to a small dog or medium dog.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(s1) & subset_of(e1,s1) & on(e1,x4) & n_thing(x4) & Actor(e1,x3) & v_focus(e1) & n_thing(x3) & subset_of(x1,s1) & n_run(x1) & of(x1,x2) & n_dog(x2) & a_black(s2) & Theme(s2,x1))
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & subset_of(e1,s1) & on(e1,x4) & n_thing(x4) & Actor(e1,x3) & v_focus(e1) & n_thing(x3) & subset_of(x1,s1) & n_run(x1) & of(x1,x2) & n_dog(x2) & a_black(s3) & Theme(s3,x1) & a_big(s2) & Theme(s2,x1))