The document provides an incomplete timeline about Nelson Mandela's life and asks the reader to fill in missing information after watching a bio video about Mandela. The timeline tracks Mandela from his birth in 1918 up until he became President of South Africa in 1994. It notes important events like when he began traveling across South Africa to fight unjust laws, his arrest for treason in 1956, his imprisonment for 27 years, and his release and presidency.