About: http://webisa.webdatacommons.org/102555331

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 variety of tests may be performed on a particular sample, using techniques such as spectrophotometry and immunochemistry, to determine both the presence and concentration of a particular substance, in that sample.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com