About: http://webisa.webdatacommons.org/100501703

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	The spacer, if used, should preferably have a thickness as described just above, especially about 1 to 20 ??m.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com