Assertion: county's river | /r/CapableOf | drain the northamptonshire uplands
Facets:
value: in its upper course
type: LOCATION
value: to the north
type: LOCATION
Source sentences:
text: In its upper course the river drains a broadly triangular area defined by the chalk escarpment of the Chiltern Hills and the Berkshire Downs to the east and south, the Cotswolds to the west, and the Northamptonshire uplands to the north.