Men, women and children dance at a party.
Men, women and children are dancing at a party with streamers on the ceiling.
You cannot know if there are streamers on the ceiling since not every party has streamers on the ceiling.
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & rel(x1,x2) & subset_of(x4,x2) & at(x4,x6) & n_party(x6) & n_dance(x4) & of(x4,x5) & n_child(x5) & subset_of(x3,x2) & n_woman(x3) & n_man(x1))
exists e1 x1 x2 x3 x4 x5 x6 x7.(n_ceiling(x7) & at(e1,x5) & with(x5,x6) & on(x6,x7) & n_streamer(x6) & n_party(x5) & Actor(e1,x1) & v_dance(e1) & rel(x1,x2) & n_child(x4) & n_woman(x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))