A group of children dance and play instruments under colored lights.
A group of people are having fun.
If kids dance and play, then they would seem to be having fun.
exists e1 e2 x1 x2 x3 x4 x5 x6 x7.(a_topic(x4) & under(e1,x7) & n_light(x7) & Theme(e2,x7) & v_color(e2) & Theme(e1,x6) & Actor(e1,x5) & v_play(e1) & n_instrument(x6) & (x4 = x5) & n_group(x4) & a_topic(x1) & of(x1,x2) & n_dance(x2) & of(x2,x3) & n_child(x3) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_fun(x3) & of(x1,x2) & n_people(x2) & n_group(x1))