Complex sentence: Donald Campbell Dewar (21 August 1937--11 October 2000) was the original First Minister of Scotland, following the establishment of the Scottish Parliament, from May 1999 until his sudden death in October 2000.
Split into simpler sentences: Donald Campbell Dewar (21 August 1937--11 October 2000) was a Scottish politician, and the first holder of the office of First Minister of Scotland, following the establishment of the Scottish Parliament. His tenure as First Minister lasted from May 1999 until his sudden death in October 2000.