Complex sentence: The election was won by the Imbokodvo National Movement, which claimed all eight black roll seats and one white seat, as well as the eight seats in parliament elected by the Tinkhundla ("chiefdoms grouped for age regiment mobilisation").
Split into simpler sentences: The election was won by the Imbokodvo National Movement, which won eight of the directly-elected seats and all eight Tinkhundla seats. A further eight seats were elected by the Tinkhundla ("chiefdoms grouped for age regiment mobilisation").