About: http://webisa.webdatacommons.org/328741331

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	However, hydrogen is the lightest substance in the universe and, as such, poses challenges when it comes to capturing and storing it in large quantities.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov