Complex sentence: Barry Steven Frank Sheene (11 September 1950--10 March 2003) was a British World Champion Grand Prix motorcycle road racer, who remained as Britain's last champion in 1977 until Danny Kent in 2015.
Split into simpler sentences: Barry Steven Frank Sheene (11 September 1950--10 March 2003) was a British professional motorcycle racer. Sheene's 1977 title remained as Britain's last world championship until Danny Kent in 2015.