Question: Name the German philosopher, poet, and philologist whose novel inspired an oil painting cycle 'Also sprach Zarathustra' which was exhibited several times including Moscow in 2005?
Sentence (from "Also Sprach Zarathustra (painting)"): The "Thus Spake Zarathustra" cycle is a series of twenty-eight oil paintings made by the artist from 1995 to 1997 and thirty graphic works made in 2009.
Relevant evidence: No