About: http://webisa.webdatacommons.org/364555368

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	Coordinates may be specified without units, in which case they are considered to be user coordinates, or with units such as em, in, etc. as described in Chapter 2, in Section 2.1.
http://www.w3.org/ns/prov#wasQuotedFrom	oreilly.com