<http://webisa.webdatacommons.org/117258354>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/117258354>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/256146155>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/117258354> .
<http://webisa.webdatacommons.org/117258354>	<http://www.w3.org/ns/prov#value>	"The present invention relates to a pH calibrating and monitoring system operating in a solution containing water, and more particularly to a system including monitoring of the operational condition of a pH sensor of the system." .