About: http://webisa.webdatacommons.org/455680811

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	To us, its signals would have the appearance of echoes having delays of seconds or minutes, such as were reported thirty years ago by St???rmer and van der Pol and never explained. ...
http://www.w3.org/ns/prov#wasQuotedFrom	uio.no