About: http://webisa.webdatacommons.org/257725211

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	Vibrations from the pin as I slowly pass the shaft of the pin along the surface of interest will tell me the number, location, size, and shape of the ribs, bumps, and other protrusions I encounter.
http://www.w3.org/ns/prov#wasQuotedFrom	nfb.org