Assertion: emperor | /r/CapableOf | order general mengtian
Facets:
value: in 214 bc
type: TEMPORAL
value: to construct a wall
type: PURPOSE
Source sentences:
text: In 214 BC, to guard the northern border of his empire against the an aggressive tribe called the Xiongnu, the First Emperor ordered General Mengtian to construct a wall that eventually stretched 4,000 kilometers.