Generate a more complex version of this sentence A protectionist policy ensured a consistent nucleus of scholars and teachers.
Mesthi, versi sing luwih rumit saka ukara kasebut yaiku "Kebijakan proteksionis njamin inti sarjana lan guru sing konsisten: undang-undang sing diterbitake dening Cosimo I, Ferdinando I lan Ferdinando II wajib wong-wong sing arep entuk gelar kanggo nekani Studium Pisa. "