Complex sentence: Charles II (29 May 1630--6 February 1685) was king of Scotland from 1649 until his deposition in 1651, and king of England, Scotland, and Ireland from the restoration of the monarchy in 1660 until his death.
Split into simpler sentences: Charles II (29 May 1630--6 February 1685) was king of England, Scotland, and Ireland. He was king of Scotland from 1649 until his deposition in 1651, and king of England, Scotland, and Ireland from the restoration of the monarchy in 1660 until his death.