What is the fine-grained topic of the following text: The screening of the powerful film-documentary, Spes contra Spem, will shed light to the Italian ergastolo ostativo: a particular type life imprisonment only applicable to those who have been convicted for serious crimes related to the Mafia or Terrorism. Only return the topic.
Screening of the film-documentary "Spes contra Spem" shedding light on Italian life imprisonment for serious Mafia or Terrorism related crimes.