About: http://webisa.webdatacommons.org/324193668

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	NINETY per cent of the substance of our Galaxy is dark matter, invisible except by the gravitational pull it exerts on other matter.
http://www.w3.org/ns/prov#wasQuotedFrom	newscientist.com