A person is standing with an umbrella.
A person is running after a dog.
You can not be standing and running at the same time.
exists e1 x1 x2.(with(e1,x2) & n_umbrella(x2) & Actor(e1,x1) & v_stand(e1) & n_person(x1))
exists e1 x1 x2.(after(e1,x2) & n_dog(x2) & Actor(e1,x1) & v_run(e1) & n_person(x1))