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 oil painting "Also Sprach Zarathustra" series was exhibited several times — including the exhibition at the Institute of Philosophy of the Russian Academy of Sciences in 1997 and at the First Moscow Biennale of contemporary art in 2005.
Relevant evidence: Yes