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: Johann Sebastian Bach birth year
Useful Output:

Doc 1: Johann Sebastian Bach was born in Eisenach in 1685, a small town in Thuringia, Germany. He was the seventh and youngest child of Johann
Doc 2: Johann Sebastian Bach (born March 21 [March 31, New Style], 1685, Eisenach, Thuringia, Ernestine Saxon Duchies [Germany]—died July 28, 1750,
Doc 3: Johann Sebastian Bach was born March 21, 1685, in what is now Germany. He came from a family of musicians and was taught to play the organ by his eldest
Doc 4: Johann Sebastian Bach was born on 21 March 1685 in Eisenach in Thuringia, central Germany. The house where it is thought he lived as a child is
Doc 5: Johann Sebastian Bach was born in Eisenach, Germany on March 21, 1685. During his lifetime, Bach was better known as an organist than as a composer.