Complex sentence: A Study in Democracy by British writer Nesta Webster, published in 1919, which advanced the theory that the progress of the French Revolution was considerably influenced by a conspiracy conducted by "the lodges of the German Freemasons and Illuminati".
Split into simpler sentences: A Study in Democracy by British writer Nesta Webster, published in 1919. It advanced the theory that the progress of the French Revolution was considerably influenced by a conspiracy conducted by "the lodges of the German Freemasons and Illuminati".