Complex sentence: For this cycle, Bach developed a new chorale cantata format: in this format the opening movement is a chorale fantasia on the first stanza of the hymn, with the hymn tune as a cantus firmus.
Split into simpler sentences: For this cycle, Bach developed a new chorale cantata format. In this format the opening movement is a chorale fantasia on the first stanza of the hymn, with the hymn tune as a cantus firmus.