Complex sentence: Brian Casser (born 21 March 1936, Newcastle-upon-Tyne, Northumberland, England) is a British singer and guitarist who led the first notable beat group in Liverpool, Cass & The Cassanovas, who were early rivals of The Beatles in the city.
Split into simpler sentences: Brian Casser (born 21 March 1936, Newcastle-upon-Tyne, Northumberland, England) is a British singer and guitarist. He led the first notable beat group in Liverpool, Cass & The Cassanovas, who were early rivals of The Beatles in the city.