Complex sentence: In 1966--67, Zinovieff, Delia Derbyshire and Brian Hodgson ran Unit Delta Plus, an organisation to create and promote electronic music which was based in the studio Zinovieff had built in a shed at his house in Putney.
Split into simpler sentences: In 1966--67, Zinovieff, Delia Derbyshire and Brian Hodgson ran Unit Delta Plus, an organisation to create and promote electronic music. It was based in the studio Zinovieff had built, in a shed at his house in Putney.