Assertion: beaver's dam | /r/HasProperty | built by beaver
Facets:
Source sentences:
text: The largest dam ever built by a beaver was 2,790 foot (850m) long.
text: The largest dam that has been built by beavers can be found in Wood Buffalo National Park, Alberta, Canada.
text: Unlike dams built by humans, most of which lead to widespread displacement of human populations and large-scale ecological damage, dams built by beavers have the exact opposite result of attracting species to inhabit the newly created wetlands.