Complex sentence: Ghost Dog (Whitaker) sees himself as a retainer of Louie (John Tormey), a local mobster, who saved Ghost Dog's life years ago and while living as a hired hitman for the Italian Mafia, he strictly follows "Hagakure".
Split into simpler sentences: Ghost Dog (Whitaker) sees himself as a retainer of Louie (John Tormey), a local mobster, who saved Ghost Dog's life years ago. While living as a hired hitman for the Italian Mafia, he strictly follows "Hagakure".