The white dog by the water.
The white dog is swimming.
A dog being near water does not mean that it is swimming.
exists s1 x1 x2.(n_water(x2) & n_dog(x1) & a_white(s1) & Theme(s1,x1) & a_topic(x1) & by(x1,x2))
exists p1 s1 x1.(n_dog(x1) & a_white(s1) & Theme(s1,x1) & exists x2.((x1 = x2) & n_swimming(x2)))