Complex sentence: Helen Mary Boyd (born 8 November 1947 in Guildford, Surrey, England) was a 1960s London fashion model; she is the younger sister of Pattie Boyd, who married Beatle George Harrison.
Split into simpler sentences: Helen Mary Boyd (born 8 November 1947 in Guildford, Surrey, England) is a former 1960s London fashion model. She is also the younger sister of Pattie Boyd, who married Beatle George Harrison.