Complex sentence: He was Minister for Social Services in the Abbott Government from 18 September 2013 until 21 December 2014 when the Prime Minister announced a cabinet re-shuffle in which Andrews would become Minister for Defence.
Split into simpler sentences: He was Minister for Social Services in the Abbott Government from 18 September 2013. On 21 December 2014 the Prime Minister announced a cabinet re-shuffle in which Andrews would become Minister for Defence.