Assertion: region's city | /r/HasProperty | hosted the two powers
Facets:
value: on that occasion
type: TEMPORAL
value: for the first time
type: OTHER
Source sentences:
text: On Christmas night of 800, Charlemagne was crowned in Rome as emperor of the Holy Roman Empire by Pope Leo III: on that occasion the city hosted for the first time the two powers whose struggle for control was to be a constant of the Middle Ages.