| http://www.w3.org/ns/prov#value | - Some of the homeowners didn't even know the hillside could give way at any time.Unlike the warning systems and elaborate maps that help residents and officials prepare for natural disasters such as floods and hurricanes, there is no national system to monitor slide activity and no effort underway to produce detailed nationwide landslide hazard maps.The U.S. Geological Survey does not track or invent
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