Complex sentence: However, only 56% of eligible voters (South African citizens of voting age) took part in the 2004 election, which means that the ANC received votes from only about 38% of all eligible voters.
Split into simpler sentences: However, only 56% of eligible voters (South African citizens of voting age) took part in the 2004 election. The ANC received support from only about 38% of all eligible voters.