Original sentence: Saint Cyril (Greek: Αγιος Κύριλλος, South Slavonic: Sveti Kiril, Свети Кирил or Свети Ћирило) (827 - February 4, 869) was a Byzantine monk, scholar, theologian, and linguist
Edited sentence: Saint Cyril (Greek: Αγιος Κύριλλος, Old Church Slavonic: Свети Кирил) (827 - February 4, 869) was a Byzantine monk, scholar, theologian, and linguist