About: http://webisa.webdatacommons.org/405464875

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 base 20 comprises a non-mercury-wettable, electrically conductive material, such as steel, and has a central bore therethrough.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com