I remember seeing an article around here that explained the order in which certain great people would lightbulb technologies. I've looked around the Academy and the Articles forums, but I still haven't found it. Can anyone direct me to it, please?

It just figures that after extensive searching and a plea of help I find it. My apologies, and to any who would be looking for it:
http://forums.civfanatics.com/showthread.php?t=140952&highlight=Great+Person