Complex sentence: The chords and scales included altered dominants using flat 9ths and flat 13ths, the progressions were ii-V-I--in place the a church progression IV-V-I, the ii being borrowed from the IV chord.
Split into simpler sentences: The chords and scales included altered dominants using flat 9ths and flat 13ths. The progressions were ii-V-I--from a church progression of IV-V-I, the ii being borrowed from the IV chord.