The three girls are sitting down the set.
The three girls are on their bottoms.
Are sitting implies on their bottoms.
exists e1 x1 x2.(n_set(x2) & n_girl(x1) & card_eq_3(x1) & down(e1,x2) & Actor(e1,x1) & v_sit(e1))
exists p1 x1 x2.(n_bottom(x2) & of(x2,x1) & n_thing(x1) & n_girl(x1) & card_eq_3(x1) & on(x1,x2))