About: http://webisa.webdatacommons.org/130423707

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	Lightweight gases such as hydrogen and helium move faster than medium-weight gases like nitrogen and oxygen.
http://www.w3.org/ns/prov#wasQuotedFrom	nasa.gov