A dog with no tail runs in the dirt.
The dogs tail is getting dirty.
Either a dog has tail or no tail.
exists x1 x3.(n_dirt(x3) & -exists e1 x2.(in(e1,x3) & Actor(e1,x1) & v_run(e1) & with(x1,x2) & n_tail(x2)) & n_dog(x1))
exists e1 x1 x2 x3.(n_tail(x1) & of(x1,x2) & n_dog(x2) & Theme(e1,x3) & Actor(e1,x1) & v_get(e1) & n_dirty(x3))