About: http://webisa.webdatacommons.org/443006648

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	Examples of documents formally certified are award letters, information from the Office of Earnings Operations, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	ssa.gov