Complex sentence: Luna-Kan was born in Mérida, Yucatán, and he was a Doctor of medicine, then a Professor of Medicine before his political offices, his first being overseer of the state's rural medical system.
Split into simpler sentences: Luna-Kan was born in Mérida, Yucatán, and he was a Doctor of medicine, then a Professor of Medicine before his political offices. He was first appointed as overseer of the state's rural medical system.