PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Methane, CO2, NH3, SO2, H2S and other gases are also present in the atmosphere of the earth due to many sources like volcanoes and some biological activities. http://universeandquran.site.io/#The_Gaseous_Heavens (external - login to view)
http://www.w3.org/ns/prov#wasQuotedFrom
  • canadiancontent.net