Passage: Subjects of the Russian Empire were segregated into sosloviyes, or social estates (classes) such as nobility (dvoryanstvo), clergy, merchants, cossacks and peasants. Native people of the Caucasus, non-ethnic Russian areas such as Tartarstan, Bashkirstan, Siberia and Central Asia were officially registered as a category called inorodtsy (non-Slavic, literally: "people of another origin").

Question: What was the name of the group that the people of the Russian Empire were categorized as?
sosloviyes