Complex sentence: Waikato is the name of a current electorate in the New Zealand Parliament from 2006; which earlier existed for two periods, 1871 to 1960 and 1969 to 1996 when MMP was introduced.
Split into simpler sentences: Waikato is the name of a current electorate in the New Zealand Parliament. The electorate first existed from 1871 to 1960, and then from 1969 to 1996 when MMP was introduced.