Original sentence: After the Bulgarians/Macedonians were defeated by the Byzantine Empire, Sermon was the only ruler which refused to comply with the new Byzantine authorities.Sermon (Bulgarian, Macedonian, and Serbian Cyrillic: Сермон) was an 11th century voivode (duke) of Syrmia (and a local governor in the Bulgarian/Macedonian Empire), vassal of Bulgarian/Macedonian emperor Samuil
Edited sentence: After the Bulgarians were defeated by the Byzantine Empire, Sermon was the only ruler which refused to comply with the new Byzantine authorities.Sermon (Bulgarian, and Serbian Cyrillic: Сермон) was an 11th century voivode (duke) of Syrmia (and a local governor in the First Bulgarian Empire, vassal Samuil of Bulgaria