Task: Text Categorization
Input (English): A man who wrote under the pseudonym Picander made librettos for this composer, who created the cantata Actus Tragicus for his uncle's funeral. One work by this composer ends with a quodlibet [KWOD-luh-bet] and was commissioned to relieve Baron von Keyserling's insomnia. One collection by this composer sometimes identified as BWV 846-893 consists of two books of twenty-four preludes and fugues. For 10 points, name this Baroque period German composer of the Goldberg Variations, The Well-Tempered Clavier, and the Brandenburg Concertos.
Output (English): Fine Arts