generate questions: Numerous communities of dark-skinned peoples are present in North Africa, some dating from prehistoric communities. Others are descendants of the historical Trans-Saharan trade in peoples and/or, and after the Arab invasions of North Africa in the 7th century, descendants of slaves from the Arab Slave Trade in North Africa.
Where was the Arab Slave Trade? {sep_token} When were the Arab Invasions? {sep_token} Where were numerous dark-skinned communities? {sep_token} When did these communities begin? {sep_token} Who are they descendants of? {sep_token}