A dog runs through a field.
The dog is sleeping
A dog cannot be sleeping and running through a field at the same time.
exists e1 x1 x2.(through(e1,x2) & n_field(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 x1.(n_dog(x1) & Actor(e1,x1) & v_sleep(e1))