Complex sentence: After England took the colony in 1664, it continued the importation of slaves from Africa, as well as "seasoned" slaves from their colonies in the West Indies and enslaved Native Americans from the Carolinas.
Split into simpler sentences: After England took control the colony in 1664, its colonists continued the importation of slaves from Africa. They also imported "seasoned" slaves from their colonies in the West Indies and enslaved Native Americans from the Carolinas.