Riders ?

I recently asked Barbara Bowen - the Queen of Lotus Certification - how many dual PCLP's there were with v3, v4, v5 and v6 certifications. And she said I was one out of 40 in EMEA, and one out of 144 worldwide.
Course, Zeb mentioned that there were 144 infantry in front of the four riders of the apocalypse predicted in the armageddon. So if I'm one of the 144, who are the four ?