Complex sentence: Its first version was known as the Common Lectionary, assembled in 1983, itself an ecumenical revision of the COCU Lectionary published in 1974 by the Consultation on Church Union (COCU).
Split into simpler sentences: Its first version was known as the Common Lectionary, assembled in 1983. It was preceded by the COCU Lectionary, published in 1974 by the Consultation on Church Union (COCU).