Premise: Christoph Martin Wieland (] ; 5 September 1733 – 20 January 1813) was a German poet and writer. He is best-remembered for having written the first Bildungsroman ("Geschichte des Agathon"), as well as the epic "Oberon", which formed the basis for Carl Maria von Weber's opera of the same name.
Hypothesis: Christoph Martin Wieland wrote "Oberon" alone.