A person runs with a dog.
A surfer hangs ten.
a person who runs cant hang ten surfing at same time
exists e1 x1 x2.(with(e1,x2) & n_dog(x2) & Actor(e1,x1) & v_run(e1) & n_person(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_hang(e1) & n_ten(x2) & n_surfer(x1))