Complex sentence: As an MP for the county, Edward Henry followed five previous Cooper landlords of Markree, who had been MPs for County Sligo for all but 23 of the years 1719 to 1841.
Split into simpler sentences: As an MP for the county, Edward Henry was the last of six Cooper landlords of Markree to hold the seat. His predecessors had been MPs for County Sligo for all but 23 of the years 1719 to 1841.