Complex sentence: Directed by Madhur Bhandarkar, Bajpai's role in the film was of Nawab Khan, who is serving life imprisonment and serves as the "narrator" and "mentor" of its protagonist Parag Dixit (Neil Nitin Mukesh).
Split into simpler sentences: Directed by Madhur Bhandarkar, Bajpai's role in the film was of Nawab Khan, a convict who is serving life imprisonment. He called his role as "narrator" and "mentor" of its protagonist Parag Dixit (Neil Nitin Mukesh).