Complex sentence: At the official opening ceremony on 9 March 1909, Electric Tram 1 was driven by Anne Price, wife of Premier Thomas Price, from the Hackney depot to Kensington and back, assisted by the MTT's chief engineer.
Split into simpler sentences: At the official opening ceremony on 9 March 1909, Electric Tram 1 was driven by Mrs. Price, wife of Premier Thomas Price. Mrs Price opened the tramway and drove the tram from the Hackney Depot to Kensington and back, assisted by the MTT's chief engineer.