About: http://webisa.webdatacommons.org/28117067

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	parts in a million.^ In the Earth's heterosphere, a part of the upper atmosphere, helium and other lighter gases are the most abundant elements.
http://www.w3.org/ns/prov#wasQuotedFrom	thefullwiki.org