About: http://webisa.webdatacommons.org/404310509

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	NGC 4258 is a key galaxy for the absolute calbration of the Extragalactic Distance Scale, given its precise (3%) geometric distance obtained through VLBI observations of water masers.
http://www.w3.org/ns/prov#wasQuotedFrom	aas.org