About: http://webisa.webdatacommons.org/283962273

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	That is correct, I cannot "see air with the naked eye, but there is plenty of empirical evidence to demonstrate the existence of oxygen, carbon dioxide and other gasses in the air around me.
http://www.w3.org/ns/prov#wasQuotedFrom	city-data.com