Assertion: empire's state | /r/HasProperty | vietnam
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Source sentences:
text: The neighbouring states of the Northern Song empire were Vietnam (Lý Dynasty 李), Dali 大理 in the region of modern Yunnan, and Jinglong 景曨 in the south, Korea (Koryŏ 高麗) was governed by a house descendant of the old Silla Empire 新羅.