two dancers dance together.
There are two people dancing.
If there are two people dancing then two dancers are dancing together.
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 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_dance(e1) & (x2 = x3) & n_people(x2) & card_eq_2(x2))