A dog runs through a field.
A dog sleeps in the yard.
If the dog runs then it cannot be sleeping at the same time it is running.
exists e1 x1 x2.(through(e1,x2) & n_field(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 x1 x2.(n_yard(x2) & in(e1,x2) & Actor(e1,x1) & v_sleep(e1) & n_dog(x1))