Complex sentence: He became UNITA's Vice President in 1992, following the resumption of the Angolan Civil War following the death of former UNITA Vice President Jeremias Chitunda, who was killed by the Angolan government in 1992.
Split into simpler sentences: He became UNITA's Vice President in 1992 when the Angolan Civil War resumed. Dembo succeeded Jeremias Chitunda, who was killed by the Angolan government in 1992.