A dog walking on mud flats.
The pets are sleeping
It is not possible to be sleeping while walking on mud.
exists x1 x2 x3 x4.(a_topic(x1) & on(x1,x3) & n_flat(x3) & of(x3,x4) & n_mud(x4) & n_walking(x1) & of(x1,x2) & n_dog(x2))
exists e1 x1.(n_pet(x1) & Actor(e1,x1) & v_sleep(e1))