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: "Memphis Belle is the nickname of a four-engine bomber which was introduced in what year?" whose answer is 1938.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Memphis Belle introduction year
Useful Output:

Doc 1: 75 years after its last bombing run in #WorldWarII, the #MemphisBelle is on display at the National Museum of the U.S. Air Force.
Doc 2: Recently EAA staff attended the opening of the B-17F Memphis Belle exhibit, which honored the first heavy bomber aircraft and crew to
Doc 3: Today we're visiting a famed and beloved B-17 Flying Fortress, Movie Memphis Belle. This iconic aircraft was converted from an G model to a F
Doc 4: Recently EAA staff attended the opening of the B-17F Memphis Belle exhibit in 2018, which honored the first heavy bomber aircraft and crew to
Doc 5: Memphis Belle was a B-17F-10-BO, serial 41-24485, contracted for construction in 1941 and completed at Boeing's Seattle plant in 1942. It was