Complex sentence: Kazuo threatens the Boss'longtime friend and leader of the Triads gang, Mr. Wong and is killed by the Boss during a Chinese New Year's celebration after being defeated in a swordfight.
Split into simpler sentences: Kazuo threatens the Boss'longtime friend and leader of the Triads gang, Mr. Wong. Kazuo is killed by the Boss during a Chinese New Year's celebration after being defeated in a swordfight.