A dog swims in a pool.
A dog swims with his owner.
The owner of the dog isn't necessarily in the pool
exists e1 x1 x2.(in(e1,x2) & n_pool(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1))
exists e1 x1 x2.(with(e1,x2) & n_owner(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_swim(e1) & n_dog(x1))