| http://www.w3.org/ns/prov#value | - In order to selectively warn persons of the need to stay inside their house, office, school or other building, such as in the situation of a nearby chemical spill or a criminal or wild animal on the loose, or the need to evacuate the area due to a wildfire, potential dam failure or poisonous chemical spill, communities generally rely on personal notification of persons in the buildings.
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