Elderly couples dance at night, with strings of lights in the background.
Elderly couples dancing.
dance and dancing are two words that describe the same action
exists e1 x1 x2 x3 x4 x5 x6.(n_background(x6) & with(e1,x4) & of(x4,x5) & in(x5,x6) & n_light(x5) & n_string(x4) & at(e1,x3) & n_night(x3) & Theme(e1,x2) & Actor(e1,x1) & v_couple(e1) & n_dance(x2) & n_elderly(x1))
exists e1 s1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_dance(e1) & (x1 = x2) & n_couple(x1) & a_elderly(s1) & Theme(s1,x1))