two dancers dance together.
A man and a woman are dancing together.
Simply because a woman and man dance one cannot infer that they are dancers.
exists e1 p1 x1.(exists s1.(Theme(s1,x1) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_dance(e1) & n_dancer(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_dance(e1) & subset_of(x3,x1) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))