Complex sentence: Robert Sullivan is the Founder and Chief Instructor of Go-Kan-Ryu Karate was graded to 8th dan black belt by his Senior Instructors on the 16th August 2009, though has never been externally graded above 2nd dan.
Split into simpler sentences: Robert Sullivan is the Founder and Chief Instructor of Go-Kan-Ryu Karate. Kancho Sullivan was graded to 8th dan black belt by his Senior Instructors on the 16th August 2009, though has never been externally graded above 2nd dan.