Background: In the 18th century, the Moroccan Sultan Moulay Ismail "the Bloodthirsty" (1672–1727) raised a corps of 150,000 black slaves, called his Black Guard, who coerced the country into submission.
Question: How many black slaves did he own?
Answer:<extra_id_0>.
<extra_id_0> 150,000<extra_id_1>