Here's a short story:

Sony Music Entertainment Inc. (sometimes known as Sony Music or by the initials, SME) is an American music corporation managed and operated by Sony Corporation of America (SCA), a subsidiary of Japanese conglomerate Sony Corporation. In 1929, the enterprise was first founded as American Record Corporation (ARC) and, in 1938, was renamed Columbia Recording Corporation, following ARC's acquisition by CBS. In 1966, the company was reorganized to become CBS Records. In 1987, Sony Corporation of Japan bought the company, and in 1991, renamed it SME. It is the world's second largest recorded music company, after Universal Music Group. 

In 2004, SME and Bertelsmann Music Group merged as Sony BMG Music Entertainment. When Sony acquired BMG's half of the conglomerate in 2008, Sony BMG reverted to the SME name. The buyout led to the dissolution of BMG, which then relaunched as BMG Rights Management. Out of the "Big Three" record companies, with Universal Music Group being the largest and Warner Music Group, SME is middle-sized. (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What company is the article about
Guess: Sony Music Entertainment Inc.

Question: What country are they out of
Guess: American

Question: What year were they founded
Guess: 1929

Question: What was the original name
Guess: ARC

Question: What year did this change
Guess: 1938

Question: What was the new name
Guess: Columbia Recording Corporation

Question: What year did CBS obtain it
Guess: 1966

Question: What were they called then
Guess: CBS Records

Question: What year did Sony Corporation of Japan purchase it
Guess: 1987

Question: What did they rename it
Guess: SME

Question: Are they the largest music group
Guess: No

Question: Who is the largest
Guess: Universal Music Group

Question: Who did SME merge with in 2004
Guess: Bertelsmann Music Group

Question: What were they called after the merger
Guess: Sony BMG Music Entertainment

Now answer the following question in the same format.

Question: What year did Sony acquire BMG's half of the conglomerate

2008