Complex sentence: On 5 October 2016, Temperton's death was announced after what was "a brief aggressive battle with cancer" according to his music publisher, who explained that he had died in London the previous week and his funeral had already taken place.
Split into simpler sentences: On 5 October 2016, Temperton's death was announced after what was described by his music publisher as "a brief aggressive battle with cancer". Temperton had died in London the previous week and his funeral had already taken place.