Assertion: drainage basin | /r/HasProperty | drained by river
Facets:
Source sentences:
text: A river basin is an area of land drained by a river and its tributaries.
text: Some like to measure the size of a river is by the size of its watershed, which is the area drained by a river and its tributaries.
text: A river basin, is the area of land that is drained by a river and all its tributaries.