Complex sentence: He defeats Han Sang-Jin in less than 3 minutes, when he goes to his gym to get revenge for his master, after Woo So-Choi ´ s special underwater training, he fights Dokko Dae-San and wins.
Split into simpler sentences: He defeats Han Sang-Jin in less than 3 minutes, when the latter goes attempts to avenge his master. After Woo So-Choi ´ s special underwater training, he fights Dokko Dae-San and wins.