Four dogs are being walked by two owners.
Two owners walk their four cats.
There can be either cats or dogs
exists e1 x1 x2.(Actor(e1,x2) & n_owner(x2) & card_eq_2(x2) & Theme(e1,x1) & v_walk(e1) & n_dog(x1) & card_eq_4(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_cat(x2) & card_eq_4(x2) & of(x2,x1) & n_thing(x1) & n_owner(x1) & card_eq_2(x1))