About: http://webisa.webdatacommons.org/189005828

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	Molecular hydrogen is usually created on dust grains composed of heavy elements such as iron.
http://www.w3.org/ns/prov#wasQuotedFrom	physicsworld.com