Complex sentence: Truefitt & Hill is the oldest known barbershop in the world: as certified by Guinness Book of World Records in April 2000, Truefitt was established in 1805 by William Francis Truefitt.
Split into simpler sentences: Truefitt & Hill is the oldest barbershop in the world. As certified by Guinness Book of World Records in April 2000, Truefitt was established in 1805 by William Francis Truefitt.