About: http://webisa.webdatacommons.org/212415189

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	Proficiency test samples are materials whose identity, type, or values have been previously characterized and are used to assess the performance of a laboratory or an individual(s).
http://www.w3.org/ns/prov#wasQuotedFrom	fbi.gov