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 did harry potter and the deathly hallows book come out?" whose answer is 21 July 2007.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Harry Potter and the Deathly Hallows publication date
Useful Output:

Doc 1: Midnight book release of Deathly Hallows, Irving, TX, Barnes & Noble bookstore.
Doc 2: Summary: This guide explores the publication date of Harry Potter and the Deathly Hallows, examining the anticipation surrounding its release,
Doc 3: the seventh — and last — installment in the series, “Harry Potter and the Deathly Hallows,” will be published on July 21
Doc 4: Harry Potter and the Deathly Hallows: Harry Potter, Book 7. Book J. K. Rowling  Publication date : July 21, 2007; Number of pages : 759; Last updated
Doc 5: Harry Potter and the Deathly Hallows. (10 reviews with an average rating of  Harry Potter and the Philosopher's Stone, which was first published in 1997.