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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	Since hydrogen is a very light and volatile substance, efficient storage is currently one of the greatest challenges for a prospective hydrogen fuel cell technology in automobiles.
http://www.w3.org/ns/prov#wasQuotedFrom	stanford.edu