Complex sentence: Reluctant to leave her home, at the end of her year in Oslo, Rona returned to Hungary, taking a position at the Radium-Cancer Hospital in Budapest preparing radium for medicinal purposes.
Split into simpler sentences: Reluctant to leave her home, at the end of her year in Oslo, Rona returned to Hungary. She was appointed to a position at the Radium-Cancer Hospital in Budapest, preparing radium for medicinal purposes.