Complex sentence: Sir John McLeod Scarlett, (born 18 August 1948) was Chief of the British Secret Intelligence Service (MI6) from 2004 to 2009.
Split into simpler sentences: Sir John McLeod Scarlett, (born 18 August 1948) is a retired British senior intelligence officer. He was Chief of the British Secret Intelligence Service (MI6) from 2004 to 2009.