query: What is the longest symphony?
passage: Symphony No. 3 (Mahler)
The Symphony No. 3 by Gustav Mahler was written in 1896,[1] or possibly only completed in that year, but composed between 1893 and 1896.[2] It is his longest piece and is the longest symphony in the standard repertoire, with a typical performance lasting around 90 to 105 minutes. It was voted one of the ten greatest symphonies of all time in a survey of conductors carried out by the BBC Music Magazine.[3]
passage: Thomas Böcker
Thomas Böcker has since developed a long-standing relationship with the "London Symphony Orchestra", Royal Stockholm Philharmonic Orchestra and WDR Radio Orchestra in Cologne. This culminated in the best-selling concert performances "Symphonic Fantasies" – music from Square Enix (2009, 2012, 2016), "LEGENDS" - music from Nintendo (2011) and the "Final Symphony" concerts (2013-). As a world's first, Böcker’s productions have been broadcast live to radio listeners worldwide by the WDR and have even been enjoyed internationally through live video streams. In 2012, the Tokyo Philharmonic Orchestra performed two "Symphonic Fantasies" concerts at the Tokyo Bunka Kaikan concert hall in Tokyo, Japan, produced by Thomas Böcker, with more than 4,600 people in attendance.