You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who plays the role of nelson mandela in long walk to freedom?" whose answer is Atandwa Kani.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who plays nelson mandela in long walk to freedom
Useful Output:

Doc 1: It's a moving, informative treatment of Nelson Mandela's eponymous autobiography. And Winnie Mandela as played by Naomie Harris is compelling.
Doc 2: Elba, known from his roles on the television shows Luther and The Wire and from films such as Pacific Rim, gives a confidently controlled
Doc 3: Nelson Mandela deserves a great movie about his life, and though actor Idris Elba does an admirable job capturing the man's spirit throughout
Doc 4: And in “Mandela: Long Walk to Freedom,” Justin Chadwick's stately screen biography of Nelson Mandela, the British actor Idris Elba conveys the
Doc 5: Elba is one of the few actors who could convey both the anger and charisma that drew people to Mandela. It's a side of Mandela not many may be