sentences:  Manchester has two symphony orchestras, the Hallé and the BBC Philharmonic.There is also a chamber orchestra, the Manchester Camerata, and the Gorton Philharmonic Orchestra, an amateur orchestra founded in 1854.In the 1950s, the city was home to the so-called 'Manchester School' of classical composers, which comprised Harrison Birtwistle, Peter Maxwell Davies, David Ellis and Alexander Goehr.