Complex sentence: Pyrrho was an ancient philosopher credited with forming the first comprehensive school of skeptical thought, now described as Pyrrhonism, or Pyrrhonian skepticism which can be further divided into ephectic Pyrrhonism, aporetic Pyrrhonism or zetetic Pyrrhonism.
Split into simpler sentences: Pyrrho was an ancient philosopher credited with forming the first comprehensive school of skeptical thought, now described as Pyrrhonism, or Pyrrhonian Skepticism. The school of though can be further divided into ephectic Pyrrhonism, aporetic Pyrrhonism or zetetic Pyrrhonism.