Complex sentence: Demar attended Woodside High School in London, England and All Saints Catholic High School in Ottawa, Ontario, and began his career with Hendon F.C. an English football club based in Hendon, in the London Borough of Barnet.
Split into simpler sentences: Demar attended Woodside High School in London, England and All Saints Catholic High School in Ottawa, Canada. He began his career with Hendon F.C. an English football club based in Hendon, in the London Borough of Barnet.