People in a dark subway tunnel.
People are enjoying the sunshine on the beach.
tunnel  is not the same as  beach
exists s1 x1 x2 x3.(a_topic(x1) & in(x1,x2) & n_tunnel(x2) & of(x2,x3) & n_subway(x3) & a_dark(s1) & Theme(s1,x2) & n_people(x1))
exists e1 x1 x2 x3.(n_beach(x3) & n_sunshine(x2) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & on(x2,x3) & n_people(x1))