Two young girls look at something.
there is two girls playing in the garden
there cannot be  look at something and playing in the garden simultaneously
exists e1 s1 x1 x2.(at(e1,x2) & n_thing(x2) & Actor(e1,x1) & v_look(e1) & n_girl(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1 x4.(n_garden(x4) & exists e1 x2 x3.((x1 = x2) & in(e1,x4) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_girl(x2) & card_eq_2(x2)))