Assertion: caliphate | /r/CapableOf | expand under umar's reign
Facets:
value: rapidly
type: MANNER
value: from 634
type: TEMPORAL
Source sentences:
text: The caliphate expanded rapidly under Umar's reign from 634 to 644, spreading north to Mesopotamia, east to the Persian lands of the defeated Sassanid Empire and west across North Africa.