Complex sentence: Aside from the fundamental class groups stated above, there were also classes of individuals with different legal rights known as peregrinus, the term used during the early Roman Empire to describe a free provincial subject of the Roman Empire who was not a citizen.
Split into simpler sentences: Aside from the fundamental class groups stated above, there were also classes of non-Roman citizens with different legal rights known as peregrine. Peregrinus was the term used during the early Roman Empire to describe a free provincial subject of the Roman Empire who was not a citizen.