Assertion: yak | /r/AtLocation | mountainous areas
Facets:
value: in the 1970s
type: TEMPORAL
value: in 1980s
type: TEMPORAL
value: to increase utilization of the grasslands
type: PURPOSE
value: in northern china
type: LOCATION
Source sentences:
text: In the 1970s and 1980s, the yak was introduced to mountainous areas in northern China (but at lower altitudes of 1 500 - 1 800 m) to increase utilization of the grasslands in these cold areas.