Complex sentence: Pierre-Charles Marcel (1910--1992) was a leading Protestant Christian pastor and philosopher who had been a student of France's leading evangelical-confessional mind M. Auguste Lecerf (1873--1943).
Split into simpler sentences: Pierre-Charles Marcel (1910--1992) was a leading Protestant Christian pastor and philosopher. He was a student of France's leading evangelical-confessional mind M. Auguste Lecerf (1873--1943).