Two adults on cellphones downtown.
A man and a woman are talking on their cellphone.
Two adults, both male and female are talking on their cellphone, just because they are on their cellphones downtown does not mean that they were talking on them.
exists x1 x2 x3.(a_topic(x1) & on(x1,x2) & n_downtown(x2) & of(x2,x3) & n_cellphone(x3) & n_adult(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(on(e1,x4) & n_cellphone(x4) & of(x4,x2) & n_thing(x2) & Actor(e1,x1) & v_talk(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))