Four people are farming in a field.
Four people are on the couch.
People cannot be farming a field whilst on the couch.
exists e1 x1 x2.(in(e1,x2) & n_field(x2) & Actor(e1,x1) & v_farm(e1) & n_people(x1) & card_eq_4(x1))
exists p1 x1 x2.(n_couch(x2) & on(x1,x2) & n_people(x1) & card_eq_4(x1))