Assertion: dynasty's people | /r/HasProperty | purchased as slave
Facets:
value: by arab merchants
type: OTHER
Source sentences:
text: In 1178, the Guangzhou customs officer Zhou Qufei wrote in Lingwai Daida of an island far west in the Indian Ocean (possibly Madagascar), from where people with skin "as black as lacquer" and with frizzy hair were captured and purchased as slaves by Arab merchants.