About: http://webisa.webdatacommons.org/212251241

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	Typically this setting must be to within a few microns in Z, which can be accomplished using, for example, a capacitance distance measuring device, such as manufactured by ADE Technology of Newton, Mass.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com