A dog swims toward a stick
A dog is swimming for fun
The dog swimming dose not mean that dog is having fun.
exists e1 x1 x2.(toward(e1,x2) & n_stick(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1))
exists e1 x1 x2.(for(e1,x2) & n_fun(x2) & Actor(e1,x1) & v_swim(e1) & n_dog(x1))