Complex sentence: In March 1909, Crowley began production of a biannual periodical that acted as the "Official Organ" of the A ∴ A ∴, titled "The Equinox", which was billed as "The Review of Scientific Illuminism".
Split into simpler sentences: In March 1909, Crowley began production of a biannual periodical titled "The Equinox". Acting as the "Official Organ" of the A ∴ A ∴, he billed this periodical as "The Review of Scientific Illuminism".