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 record player come out?" whose answer is 1877.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was the first record player invented
Useful Output:

Doc 1: By 1930, the company RCA Victor launched the first commercially available vinyl long-playing record. Instead of 78 rpm, the playback speed for
Doc 2: Invented by none other than Thomas Edison himself, the phonograph was a device designed for recording sound and playing it back.
Doc 3: Though experimental mechanisms of this type appeared as early as 1857, the invention of the phonograph is generally credited to the American
Doc 4: History of Phonograph, First Record Player Invented by Thomas. A. Edison 1877 #phonograms #thomasalvaedison #antique #antiquecollection
Doc 5: Record players were the first devices used to create and play music on a record. They were invented in the late 19th century, but it was not