About: http://webisa.webdatacommons.org/259508154

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	Since the beginning of the 21st century, it has become apparent that known kinds of matter and energy make up only about 4 percent of the universe.
http://www.w3.org/ns/prov#wasQuotedFrom	sott.net