Adults and children are in a rooming dancing.
The people are dancing
Adults and children are people.
exists p1 x1 x2 x3.(exists x4 x5.(in(x1,x4) & n_dancing(x4) & of(x4,x5) & n_rooming(x5)) & n_child(x3) & n_adult(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_dance(e1))