Man in suit dancing with woman in white dance suit.
Some people dancing.
A man and woman both dancing are people doing some dancing.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x5) & n_suit(x5) & of(x5,x6) & n_dance(x6) & a_white(s1) & Theme(s1,x5) & with(e1,x4) & n_woman(x4) & Actor(e1,x3) & v_dance(e1) & (x1 = x3) & in(x1,x2) & n_suit(x2) & n_man(x1))
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_dance(e1) & (x1 = x2) & n_people(x1))