You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Unser Mund sei voll Lachens is a church cantata by a composer born in what year?" whose answer is 1685.
Each document should contain about 30 words, and these documents should contain useful information.

Query: "Unser Mund sei voll Lachens" composer
Useful Output:

Doc 1: Unser Mund sei voll Lachens (May our mouths be full of laughter), BWV 110, is a church cantata by Johann Sebastian Bach. He composed the Christmas cantata
Doc 2: Recordings. J.S. Bach: Unser Mund sei voll Lachens, BWV 110, Philippe Herreweghe, Collegium Vocale, Vasiljka Jezovsek (soprano), Sarah Connolly
Doc 3: Unser Mund sei voll Lachens und unsre Zunge voll Rühmens. Denn der Herr hat Großes an uns getan. May our mouth be filled with laughter and
Doc 4: Unser Mund sei voll Lachens  Composed for Christmas Day in 1725 to an unconventional libretto by Georg Christian Lehms, cantata BWV 110
Doc 5: The original manuscript score to Johann Sebastian Bach's cantata "Unser Mund sei voll Lachens", BWV 110. I: Unser Mund  Every Major Composer's