Complex sentence: Lionel Cranfield, 1st Earl of Middlesex (1575--6 August 1645) was a successful merchant in London, England, who was introduced to King James I and VI of England and Scotland by Lord Northampton, and entered the Royal service in 1605.
Split into simpler sentences: Lionel Cranfield, 1st Earl of Middlesex (1575--6 August 1645) was a successful merchant in London, England. He was introduced to King James I and VI of England and Scotland by Lord Northampton, and entered the Royal service in 1605.