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: "The Happy Meal was invented by the restaurant chain founded in what year?" whose answer is 1940.
Each document should contain about 30 words, and these documents should contain useful information.

Query: McDonald's founded year
Useful Output:

Doc 1: On May 15,1940, McDonald's Bar-B-Que restaurant opened in San Bernardino by brothers Richard (1909-1998) and Maurice (1902-1971) McDonald.
Doc 2: Ray Kroc is a pioneer in the world of business and franchising, often referred to as the founder of the fast-food empire McDonald's.
Doc 3: McDonald's was established in San Bernadino, California in 1940 by the McDonald brothers as a BBQ restaurant. In 1948, they rebranded the
Doc 4: McDonald's was founded on the 15th of April, 1955, by Ray Kroc with the first franchised restaurant in Des Plaines, Illinois. However, the
Doc 5: Brothers Maurice and Richard McDonald started the first McDonald's restaurant in 1948 by converting their drive-through barbecue restaurant into