a girl stands in the train tracks.
A child inside a railroad tunnel.
Not all train tracks are railroad tunnels.
exists e1 x1 x2 x3.(n_track(x2) & of(x2,x3) & n_train(x3) & in(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_girl(x1))
exists x1 x2 x3.(a_topic(x1) & inside(x1,x2) & n_tunnel(x2) & of(x2,x3) & n_railroad(x3) & n_child(x1))