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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	Examples such as sand, soil, and aerosol particulates to 20???k ft altitude, ingested into and transformed by heat engines, may produce products that contribute to health hazards even when aircraft ventilation systems are HEPA filtered.
http://www.w3.org/ns/prov#wasQuotedFrom	hindawi.com