Complex sentence: Musician Ringo Starr was born in 9 Madryn Street, where he lived until the age of 4 when his family moved a minute's walk away to Admiral Grove where he still lived when he joined the Beatles.
Split into simpler sentences: Musician Ringo Starr was born in 9 Madryn Street, where he lived until the age of 4. His family then moved to Admiral Grove, a minute's walk away, where he was still living when he joined the Beatles.