Assertion: gulf | /r/HasProperty | defined in the north
Facets:
value: by the northern coastline of vietnam
type: LOCATION
value: to the east
type: LOCATION
Source sentences:
text: The Gulf is defined in the west by the northern coastline of Vietnam, in the north by China's Guangxi Zhuang Autonomous Region, and to the east by China's Leizhou Peninsula and Hainan Island.