About: http://webisa.webdatacommons.org/229082259

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	Each of the electrodes 21 is composed of a material, such as zinc or magnesium, which has a stronger ionization tendency than the pipe metal 20, namely, which is electrochemically less noble than the pipe metal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com