Complex sentence: During 1962 SWAPO had emerged as the dominant nationalist organisation for the Namibian people, co-opting other groups such as the South West Africa National Union (SWANU), and in 1976 the Namibia African People's Democratic Organisation.
Split into simpler sentences: During 1962 SWAPO had emerged as the dominant nationalist organisation for the Namibian people. It co-opted other groups such as the South West Africa National Union (SWANU), and later in 1976 the Namibia African People's Democratic Organisation.