Complex sentence: Balala began his political career as the mayor of Mombasa, Kenya, thereafter he successfully vied for the Mvita parliamentary seat in 2002 general elections.
Split into simpler sentences: Balala began his political career as the mayor of Mombasa, Kenya. His political career started as the Mayor of the City of Mombasa, thereafter he successfully vied for the Mvita parliamentary seat in 2002 general elections.