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: "who wrote the first 4 books of the old testament?" whose answer is exilic returnees.
Each document should contain about 30 words, and these documents should contain useful information.

Query: authors of the first four books of the old testament
Useful Output:

Doc 1: The first division is the Pentateuch, which comprises Genesis, Exodus, Leviticus, Numbers, and Deuteronomy. The second division is called the
Doc 2: Did you know that the arrangement of the Old Testament in Protestant Christian Bibles is not original?  The book of Ecclesiastes is the author's response to
Doc 3: Meet the 29 authors God chose to write the Old Testament. From Moses to Malachi, explore the fascinating stories behind these writers of
Doc 4: The first five books of the Bible recount historical events which include God coming down in fire on the mountain to give His people His law (Ex
Doc 5: For at least 1,000 years, both Jewish and Christian tradition held that a single author wrote the first five books of the Bible—Genesis, Exodus,