A group of girls in dresses dancing.
A group of girls are doing the salsa.
Not all dances are the salsa.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Actor(e1,x4) & v_dance(e1) & (x1 = x4) & in(x1,x3) & n_dress(x3) & of(x1,x2) & n_girl(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_salsa(x3) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & of(x1,x2) & n_girl(x2) & n_group(x1))