About: http://webisa.webdatacommons.org/230293885

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 color reaction can be read visually, or with an instrument, such as a spectrophotometer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com