Original sentence: He became a member of the National Democratic Party in 1961 and was elected a councillor.His political activities saw him detained at Khami Maximum Security, Selukwe and Marandellas prisons between 1959 and 1961.In 1957, Msika was elected National Treasurer of the newly-formed African National Congress, and after it was banned he was made Secretary for Youth in its successor, ZAPU.In 1963, Msika was elected as ZAPU Secretary for Youth Affairs before becoming Secretary for External Affairs of the People's Caretaker Party after the NDP was banned.Msika was later a member of the delegation to the Lancaster House Agreement that forged independence for Zimbabwe
Edited sentence: As a result of his political activities, he was detained at Khami Maximum Security, Selukwe and Marandellas prisons from 1959 to 1961.He joined the National Democratic Party in 1961 and was elected a councillor.In 1963, Msika was elected as ZAPU Secretary for Youth Affairs, and after the NDP was banned he became Secretary for External Affairs of the People's Caretaker Party.In 1979, Msika was a member of the delegation to the Lancaster House Agreement that forged independence for Zimbabwe.Msika was elected as National Treasurer of the African National Congress in 1957; it was subsequently banned, at which point Msika became Secretary for Youth in the Zimbabwe African People's Union (ZAPU), its successor organization