The dog is biting a stick.
A dog with an oak stick.
Just because a dog is biting a stick it does not mean it is an oak stick.
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_bite(e1) & n_stick(x2))
exists x1 x2 x3.(a_topic(x1) & with(x1,x2) & n_stick(x2) & of(x2,x3) & n_oak(x3) & n_dog(x1))