Complex sentence: Burke was affiliated with the Whig Party which eventually became the Liberal Party, but the modern Conservative Party is generally thought to derive from the Tory party and the MPs of the modern conservative party are still frequently referred to as Tories.
Split into simpler sentences: Burke was affiliated with the Whig Party which eventually became the Liberal Party. However, the modern Conservative Party is generally thought to derive from the Tory party and the MPs of the modern conservative party are still frequently referred to as Tories.