About: http://webisa.webdatacommons.org/388960658

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	A disadvantage of both types of mechanism is that the reference must have a geometrical form which reproduces the motion desired and must be capable of being fabricated with the accuracy required.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com