Given the task definition and input, reply with output. In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.

Question: Before Gilbert and Sullivan's final collaboration 1896, how many operas in total had they worked on together? Passage 1:He started his career with Shrewsbury Town in 1988, and after being voted onto the PFA Team of the Year, moved on to Manchester City for £500,000 in October 1993. In August 1995 he transferred to Portsmouth for £200,000, moving on to Peterborough United for £225,000 in March 1996. He joined Leyton Orient for £65,000 in March 1997, where he stayed for four years, interrupted by short spells at Wrexham (on loan) and Port Vale. He played for Luton Town between July 2001 and 2003 following a £65,000 transfer, later dropping into non-league football with Harlow Town, Braintree Town, Brentwood Town, and Maldon Town. He also represented Wales at under-21 level and also for the "B" team. Within his three spells with Leyton Orient he achieved cult status and in 2004 received 9% of the vote for all-time cult hero behind Peter Kitchen and Terry Howard.
 Passage 2:The record builds on ideas explored in Pink Floyd's earlier recordings and performances, while omitting the extended instrumentals that characterised their earlier work. A concept album, its themes explore conflict, greed, time, death, and mental illness, the latter partly inspired by the deteriorating health of founding member Syd Barrett, who departed the group in 1968. The group used recording techniques such as multitrack recording, tape loops, and analogue synthesisers. Snippets from interviews with the band's road crew, as well as philosophical quotations, were also used. Engineer Alan Parsons was responsible for many sonic aspects and the recruitment of singer Clare Torry, who appears on "The Great Gig in the Sky". The sleeve, which depicts a prism spectrum, was designed by Storm Thorgerson, following keyboardist Richard Wright's request for a "simple and bold" design, representing the band's lighting and the record's themes. The album was promoted with two singles: "Money" and "Us and Them".
 Passage 3:When the Gilbert and Sullivan partnership collapsed after the production of The Gondoliers in 1889, their producer Richard D'Oyly Carte struggled to find successful new works to show at the Savoy Theatre. Carte produced Sullivan's grand opera, Ivanhoe at another theatre, and afterwards, he turned to Sullivan to create more comic operas for the Savoy. With Sydney Grundy, Sullivan wrote the nostalgic and sentimental Haddon Hall (1892) then, reunited with W. S. Gilbert, he produced Utopia, Limited (1893). He next returned, with his earlier collaborator F. C. Burnand, with The Chieftain (1894) and collaborated for the last time with Gilbert on The Grand Duke (1896). None of these had proved to be more than modestly successful, and Carte's other new pieces for the Savoy in the 1890s had done no better. Following the success of Sullivan's ballet Victoria and Merrie England in 1897, Carte asked Sullivan to work on another new opera for the Savoy.
3