two dancers dance together.
Two women are in a ballet.
Not all dancers are women.  Although they are dancing together, it does not imply they are in a ballet.
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 p1 x1.(exists x2.(in(x1,x2) & n_ballet(x2)) & n_woman(x1) & card_eq_2(x1))