Complex sentence: Known internationally as the White Stripes'unofficial archivist or even "third member", he reportedly owns live recordings of every known Stripes' performance.He is alleged to have written the liner notes to "Under the Blackpool Lights" as well.
Split into simpler sentences: Known internationally as the White Stripes'archivist or even third member, he reportedly owns live recordings of every known Stripes' performance. Probably wrote the liner notes to "Under Blackpool Lights" as well.