Complex sentence: In this song, Gwenc'hlan sits inprisoned after having his eyes gouged out for refusing to convert to Christianity; while awaiting his execution he sings out that he isn't afraid to die and makes a prophecy wherein he will be avanged.
Split into simpler sentences: In this song Gwenc'hlan sits inprisoned after having his eyes gouged out for refusing to convert to Christianity. While awaiting his execution he sings out that he isn't afraid to die and his prophecy where he will be avanged.