About: http://webisa.webdatacommons.org/140037876

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 a natural component of natural gas and petroleum; it is only asmall fraction of oil (hundreds of ppm), but may form an appreciable component of naturalgas.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net