A farmer and three children work on a farm.
The animals are working on the farm.
There can either be a farmer and three children or animals.
exists e1 x1 x2 x3.(on(e1,x3) & n_farm(x3) & Actor(e1,x1) & v_work(e1) & n_child(x1) & card_eq_3(x1) & of(x1,x2) & n_farmer(x2))
exists e1 x1 x2.(n_farm(x2) & n_animal(x1) & on(e1,x2) & Actor(e1,x1) & v_work(e1))