Assertion: beaver's dam | /r/CapableOf | keep water
Facets:
value: on the land
type: LOCATION
Source sentences:
text: Beavers reliably and economically maintain wetlands that sponge up floodwaters, alleviate droughts and floods (because their dams keep water on the land longer), lesson erosion, raise the water table and act as the “earth’s kidneys” to purify water.