Original sentence: Established in Ohrid in 886 by Saint Clement of Ohrid on the order of Boris I, the Ohrid Literary School was involved in the spreading of the Cyrillic.The Ohrid Literary School became one of the two major cultural centres of the First Bulgarian Empire, along with the Preslav Literary School
Edited sentence: Established in Ohrid in 886 by Saint Clement of Ohrid on the order of Boris I, the Ohrid Literary School was involved in the creation of Cyrillic.The Ohrid Literary School became one of the two major cultural centres of the First Bulgarian Empire (and all the Slavs), along with the Preslav Literary School