About: http://webisa.webdatacommons.org/443750776

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 third and optional role is the Witness role which can be installed on an any version of SQL Server including Express Edition.
http://www.w3.org/ns/prov#wasQuotedFrom	mssqltips.com