title: Symphony No. 3 (Mahler)
context: 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]
question: What is the longest symphony?
answers: Symphony No. 3