Assertion: empire | /r/HasProperty | one of the largest
Facets:
value: at that time
type: TEMPORAL
Source sentences:
text: Mansa Mūsā, whose empire was one of the largest in the world at that time, is reported to have observed that it would take a year to travel...
text: The empire was the largest political entity that has existed in the Indian subcontinent, extending over 5 million square kilometres (1.9 million square miles) at its zenith under Ashoka.