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Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	An index may become unavailable due to such factors as war, natural disasters, cessation of publication of the index, or
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com