Complex sentence: He was appointed coach of the Chiefs' Super 12 side for 2001, and on 3 October 2001 was appointed as All Black coach through to the 2003 World Cup.
Split into simpler sentences: He was appointed coach of the Chiefs' Super 12 side for 2001. Mitchell was appointed as coach of the New Zealand national rugby union team from October 2001 through to the 2003 World Cup.