About: http://webisa.webdatacommons.org/19848815

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	Hydrogen is not free, but can be manufactured with no input other than water and energy.
http://www.w3.org/ns/prov#wasQuotedFrom	metafilter.com