Assertion: dynasty's kingdom | /r/CapableOf | begin crumbling by late 9th century
Facets:
value: because of internal turmoil
type: CAUSE
Source sentences:
text: The once prosperous kingdom of Later Silla, which had ruled much of the Korean Peninsula since the late 7th century, began crumbling by the late 9th century because of internal turmoil, leading to the revival of the ancient states of Baekje and Goguryeo, known in historiography as "Later Baekje" and "Later Goguryeo".