Lots of people are enjoying a concert.
The people are in public.
concert is a public
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_enjoy(e1) & n_concert(x3) & of(x1,x2) & n_people(x2) & n_lot(x1))
exists p1 x1.(n_people(x1) & exists s1 x2.(Theme(x1,s1) & Theme(s1,x2) & a_public(s1)))