What is the fine-grained topic of the following text: Brett Morgen’s documentary, Cobain: Montage Of Heck is the first ever, fully-authorised documentary and features a blend of Cobain’s personal archive of art, music, written word, and never-before-seen home movies, with animation and revelatory interviews from his family and closest confidantes. Only return the topic.
Brett Morgen’s documentary, Cobain: Montage Of Heck.