Three women in dresses dancing.
The women are dancing.
women in dresses dancing  means women are dancing
exists e1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & Actor(e1,x3) & v_dance(e1) & (x2 = x3) & n_dress(x2) & n_woman(x1) & card_eq_3(x1))
exists e1 x1.(n_woman(x1) & Actor(e1,x1) & v_dance(e1))