A dog is jumping across an obstacle.
A dog is sleeping in a cage.
The dog cannot be jumping across an obstacle and sleeping at the same time.
exists e1 x1 x2.(across(e1,x2) & n_obstacle(x2) & Actor(e1,x1) & v_jump(e1) & n_dog(x1))
exists e1 x1 x2.(in(e1,x2) & n_cage(x2) & Actor(e1,x1) & v_sleep(e1) & n_dog(x1))