Complex sentence: Lionel George Logue, CVO (26 February 188012 April 1953) was an Australian speech therapist who successfully treated, among others, King George VI, who had a pronounced stammer.
Split into simpler sentences: Lionel George Logue, CVO (26 February 188012 April 1953) was an Australian speech therapist. Most notably, Logue successfully treated King George VI, who had a pronounced stammer.