Question: Do Ludwig Heinrich Philipp Döderlein and Friedrich Demmer (tenor) share the same nationality?
Sentence (from "Prince William of Baden"): Margrave Wilhelm of Baden( 8 April 1792 in Karlsruhe – 11 October 1859 in Karlsruhe) was the second son of Karl Friedrich, Grand Duke of Baden and his second wife, Luise Karoline, Baroness Geyer von Geyersberg( 26 May 1768 – 23 July 1820), the daughter of Lt. Col. Baron Ludwig Heinrich Philipp Geyer von Geyersberg and his wife, Countess Maximiliana Christiane of Sponeck.
Relevant evidence: No