Two girls lift a third girl.
Two girls are watching a third girl being lifted by a couple boys.
If the two girls life a third girl, the third girl is not lifted by a couple boys.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_lift(e1) & n_girl(x2) & a_third(s1) & Theme(s1,x2) & n_girl(x1) & card_eq_2(x1))
exists e1 e2 s1 x1 x2 x3 x4 x5.(Theme(e2,x2) & Actor(e2,x1) & v_watch(e2) & Actor(e1,x4) & n_boy(x4) & of(x4,x5) & n_couple(x5) & Theme(e1,x3) & v_lift(e1) & (x2 = x3) & n_girl(x2) & a_third(s1) & Theme(s1,x2) & n_girl(x1) & card_eq_2(x1))