Complex sentence: Steven Moffat (born 18 November 1961) is a Scottish television writer and producer, best known for his work as showrunner, writer and producer of the British television series "Doctor Who" and "Sherlock".
Split into simpler sentences: Steven Moffat (born 18 November 1961) is a Scottish television writer and producer. He is best known for his work as showrunner, writer, and producer of the British television series "Doctor Who" and "Sherlock".