Two men talking to each other.
Two women are talking.
Women and men are not the same.
exists e1 x1 x2.(a_topic(x1) & all x3.(n_other(x3) -> to(e1,x3)) & Actor(e1,x2) & v_talk(e1) & (x1 = x2) & n_man(x1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_talk(e1) & n_woman(x1) & card_eq_2(x1))