A golden dog runs through a field of tall grass.
A dog is running after another dog.
You can not infer there is another dog.
exists e1 s1 s2 x1 x2 x3.(through(e1,x2) & of(x2,x3) & n_grass(x3) & a_tall(s2) & Theme(s2,x3) & n_field(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_golden(s1) & Theme(s1,x1))
exists e1 x1 x2.(after(e1,x2) & n_dog(x2) & -(x2 = x1) & n_dog(x1) & n_dog(x1) & Actor(e1,x1) & v_run(e1))