Complex sentence: Welling United Football Club are an English football club, based in Welling in the London Borough of Bexley and began as a youth team playing in the Eltham & District Sunday League on a park pitch from 1963/64 to 1970/71.
Split into simpler sentences: Welling United Football Club (founded in 1963) are an English football club, based in Welling in the London Borough of Bexley. They began as a youth team playing in the Eltham & District Sunday League on a park pitch from 1963/64 to 1970/71.