About: http://webisa.webdatacommons.org/342887445

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	E=k.σ-1/2.f-3/2 where E stands for the sonde error, ?? for the conductivity, f for the frequency, and k is a coefficient.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk