Complex sentence: On 14 December 1999, McCartney performed at the club, playing his last concert of the 20th century and publicising his album, "Run Devil Run", with backing musicians David Gilmour, Mick Green, Ian Paice and Pete Wingfield.
Split into simpler sentences: On 14 December 1999, McCartney performed at the club, playing his last concert of the 20th century and publicising his album, "Run Devil Run". His backing musicians were David Gilmour, Mick Green, Ian Paice and Pete Wingfield.