Complex sentence: Ancient writers usually classify the Teutons as "Germanic" and the Helvetii as "Gallic", but these ethnic attributions are debatable; the fluidity of these terms is well illustrated by Ludwig Rübekeil,', Vienna 2002.
Split into simpler sentences: Ancient writers usually classify the Teutons as "Germanic" and the Helvetii as "Gallic", but these ethnic attributions are debatable. The fluidity of these terms is well illustrated by Ludwig Rübekeil,', Vienna 2002.