Two workers stand at an entrance.
The workers have their feet on the ground.
It would be impossible for the workers to stand without having their feet on the ground.
exists e1 x1 x2.(at(e1,x2) & n_entrance(x2) & Actor(e1,x1) & v_stand(e1) & n_worker(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_ground(x3) & n_foot(x2) & of(x2,x1) & n_thing(x1) & n_worker(x1) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1))