Complex sentence: Elton John wrote his first single, "Your Song" (1970), in Denmark Street, and in the 1970s, The Sex Pistols lived above No.6, and recorded their first demos there.
Split into simpler sentences: Elton John wrote his first single, "Your Song" (1970), in Denmark Street. In the 1970s, The Sex Pistols lived above No.6, and recorded their first demos there.