Complex sentence: Arthur French (1764-24 November 1820) was a Whig Member of Parliament for Roscommon Borough, a constituency of the Parliament of Ireland, and after the Act of Union in 1801 Member of Parliament for Roscommon, a UK Parliament constituency.
Split into simpler sentences: Arthur French (1764-24 November 1820) was a British Whig politician. He was a Member of Parliament (MP) for Roscommon Borough, a constituency of the Parliament of Ireland, and after the Act of Union in 1801 Member of Parliament for Roscommon, a UK Parliament constituency.