Assertion: valley's river | /r/CapableOf | maintain lake's average level
Facets:
Source sentences:
text: Most lakes have at least one natural outflow in the form of a river or stream, which maintain a lake's average level by allowing the drainage of excess water.
text: Most lakes have at least one natural outflow in the form of a river or stream, which maintain a lake’s average level by allowing the drainage of excess water