 Complete the following phrase:  In the period before 1204, the only significant competing Imperial claim in the East appeared in 913, when Simeon I the Great, ruler of Bulgaria, was crowned Emperor and Autocrat of all Bulgarians and Romans Car i samodǎržec na vsički bǎlgari i gǎrci in the modern vernacular by the Patriarch of Constantinople and imperial regent Nicholas Mystikos outside of the Byzantine capital. The decade 914927 was then spent in a destructive 