Complex sentence: The Canberra Theatre Centre is the Australian Capital Territory's central performing arts venue and Australia's first performing arts centre, the first Australian Government initiated performing arts centre to be completed, that opened on Thursday 24 June 1965 with a gala performance by the Australian Ballet.
Split into simpler sentences: The Canberra Theatre Centre is the Australian Capital Territory's central performing arts venue and Australia's first performing arts centre, the first Australian Government initiated performing arts centre to be completed. It opened on Thursday 24 June 1965 with a gala performance by the Australian Ballet.