Complex sentence: The 2007-2008 dumsor period happened under President John Agyekum Kufuor's administration; the second 2012--present period began under the John Dramani Mahama government, after the death of then-President John Evans Atta Mills.
Split into simpler sentences: The 2007-2008 dumsor period happened under President John Agyekum Kufuor's administration. The 2012--present period began under the John Dramani Mahama government, after the death of then-President John Evans Atta Mills.