question: In what year did The Who release the double album rock opera that preceded the Who's Next studio album?
answer: 1969
context: Title: Tommy (album)
  Passage: Tommy is the fourth studio album by the English rock band The Who, a double album first released in May 1969.  The album was mostly composed by guitarist Pete Townshend as a rock opera that tells the story about a deaf, dumb and blind boy, including his experiences with life and his relationship with his family.
  Title: Who's Next
  Passage: Who's Next is the fifth studio album by English rock band The Who.  It developed from the aborted "Lifehouse" project, a multi-media rock opera written by the group's Pete Townshend as a follow-up to the band's 1969 album "Tommy".  The project was cancelled due to its complexity and conflicts with Kit Lambert, the band's manager, but Townshend was persuaded to record the songs as a straightforward studio album.
  Title: Southern Rock Opera
  Passage: Southern Rock Opera is the third studio album by the alt country band Drive-By Truckers, released in 2001.  A double album covering an ambitious range of subject matter from the politics of race to 1970s stadium rock, "Southern Rock Opera" either imagines, or filters, every topic through the context of legendary Southern band, Lynyrd Skynyrd.  The record was originally self-released on Soul Dump Records.  The album was re-released on July 16, 2002 by Lost Highway Records.  The album was financed by issuing promissory notes in exchange for loans from fans, family and friends of the band.
  Title: Tommy Victor
  Passage: Tommy Victor (born September 19, 1966) is the lead singer and guitarist for the heavy metal band Prong that he founded in New York City in 1986.  In the late 1980s Victor worked as a sound engineer at the trendy venue, CBGB in New York City.  After the release of "Rude Awakening" in 1996, Prong disbanded and Victor moved to Los Angeles but continued to release new Prong records.  He took a break from Prong during which Victor worked alongside rock musicians including Rob Zombie, Marilyn Manson, Trent Reznor and Glenn Danzig.  Since 2012's "Carved Into Stone", Prong have been very active again, releasing albums and touring relentlessly.  2013 saw the band release their "Official Bootleg -- Unleashed In The West"-album which featured re-recordings of 17 classic Prong tracks.  The next studio album "Ruining Lives" was released in 2014 and 2015 sees the band release their first ever covers album entitled "Songs From The Black Hole".  Victor is also currently working with Glenn Danzig on his upcoming Danzig album.  He is also part of the hard rock, heavy metal, hardcore punk and punk rock supergroup Teenage Time Killers.
citations: Who's Next Tommy (album)