About: http://webisa.webdatacommons.org/54102224

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	In practice, the mutual spacing d may e.g. be 320 ??m with a suitable corresponding spot diameter.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com