A dressed-up couple dances at a wedding.
The couple is the brides parents.
The couple could be anyone, not just the brides parents.
exists s1 x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_wedding(x3) & n_dance(x1) & of(x1,x2) & n_couple(x2) & a_dressed-up(s1) & Theme(s1,x1))
exists p1 x1 x2 x3.(n_parent(x2) & of(x2,x3) & n_bride(x3) & n_couple(x1) & (x1 = x2))