Complex sentence: He was appointed bishop of Moundou Diocese (Chad) on December 19,1959 and ordained a bishop on April 28,1960 until he resigned on December 19,1974.
Split into simpler sentences: He was appointed bishop of Moundou Diocese (Chad) on December 19,1959 and ordained a bishop on April 28,1960. He remained in this position until he resigned on December 19,1974.