Complex sentence: Raquette pent many years as a medical missionary in Yarkand and Kashgar and, after he was no longer able to remain in Chinese Turkistan he returned to Sweden, and took up a lectureship at the University of Lund.
Split into simpler sentences: Raquette pent many years as a medical missionary in Yarkand and Kashgar. After he returned to Sweden, and took up a lectureship at the University of Lund.