+ ;; We also want everyone else in the room to "hear" the bell,
+ ;; but they get a different message since they aren't the ones
+ ;; ringing it. Notice here's where we make use of the invoker's
+ ;; name as extracted and assigned to the who-rang variable.
+ ;; Notice how we send this message to our "location", which
+ ;; forwards it to the rest of the occupants in the room.