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: "when was the wonderful wizard of oz written?" whose answer is May 17, 1900.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the wonderful wizard of oz written
Useful Output:

Doc 1: Frank Baum's The Wonderful Wizard of Oz was the first book in what became a fourteen-volume series. It sold nearly 15,000 copies within a
Doc 2: It was originally published by the George M. Hill Company in Chicago in 1900, and has since been reprinted countless times, sometimes under the
Doc 3: Frank Baum published “The Wonderful Wizard of Oz” 120 years ago Sunday. The book would sell out its first run of 10,000 copies in eight months
Doc 4: On May 17, 1900, L. Frank Baum published The Wonderful Wizard of Oz. According to Baum himself, the name for his magical land came from the
Doc 5: Book Review: The Wonderful Wizard of Oz (1900) by L. Frank Baum #Ozathon24 – Literary Potpourri.