Complex sentence: However in terms of modern competition, it was during the 1950's that a Japanese karateka named Tatsuo Yamada first established an outline of a new sport that combined karate and muay thai.
Split into simpler sentences: However in terms of modern competition, it was during the 1950's that a Japanese karateka named Tatsuo Yamada. First established an outline of a new sport that combined karate and muay thai.