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 the first magic tree house book come out?" whose answer is July 28, 1992.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the first magic tree house book published
Useful Output:

Doc 1:  written beginning chapter book for young readers?  I even think the first few Box Car Children books are better than Magic Tree House.
Doc 2: Since the first book (Dinosaurs Before Dark) was published in 1992, the Magic Tree House has spawned more than 50 volumes — a testament to its
Doc 3: Now, it's time for me to head back to the first children's book series I ever had a favorite for: Magic Tree House. Jack and Annie.png There are
Doc 4: These irresistible books have inspired a love of reading for many children, including myself. The first book, Dinosaurs Before Dark, was
Doc 5: The Magic Tree House books are a series of over 30 fantasy-meets-historical-fiction novels written by Mary Pope Osborne. The first Magic