a black dog runs through the water.
A dog is running through the stream.
Just because a dog is running doesn't mean it's through a stream.
exists e1 s1 x1 x2.(n_water(x2) & through(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_stream(x2) & through(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))