You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: 19th CENTURY MUSIC 
Clue: Lyrics to an 1868 tune by this man began, "Guten Abend, Gut Nacht, Mit Rosen Bedacht"
johannes brahms