About: http://webisa.webdatacommons.org/159308176

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	Thin film optical sensors have been used based on an optical sensor measuring changes in a thin sensing film for detecting and measuring physical quantities such as pH, metal-ion, and toxic gas levels.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com