About: http://webisa.webdatacommons.org/219874228

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	As a result of the human perception and judgment involved, there is significant variance among those interpreting such test results as to whether a color change or other measurable signal has occurred and the degree of such occurrence.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com