Assertion: title tsar | /r/ObjectUse | used for first time
Facets:
value: following a makeshift imperial coronation
type: TEMPORAL
value: by his son
type: OTHER
Source sentences:
text: However, the title "tsar" (and its Byzantine Greek equivalent basileus) was actually adopted and used for the first time by his son Simeon I, following a makeshift imperial coronation performed by the Patriarch of Constantinople in 913.