Task: Text Categorization
Input (English): This composer reworked an instrumental sarabande into the aria Lascia ch'io planga. He called for improvised solo organ pieces to be placed ad libitum into the later of his organ concertos, a genre he invented to show off. The "Hailstone Chorus" appears in the first part of an oratorio by this man whose second part is "The Song of Moses"; that work is Israel in Egypt. One of this man's works includes a suite in G major that has a rigaudon, a minuet, and five shorter, unnamed pieces, as well as a suite in F major that begins with a (*) French overture. That piece was written to be played on barges floating on the River Thames for King George I. For 10 points, name this Baroque composer who wrote Water Music and the oratorio Messiah.
Output (English): Fine Arts