Complex sentence: Sir John Owen, 1st Baronet (1776--6 February 1861), born John Lord, was a British Tory, later Conservative Party, politician from Wales who was a Member of Parliament (MP) for over fifty years.
Split into simpler sentences: Sir John Owen, 1st Baronet (1776--6 February 1861), born John Lord, was a British Tory (later Conservative Party) politician from Wales. He sat as a Member of Parliament (MP) for over fifty years.