About: http://webisa.webdatacommons.org/42644056

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	Line frequency is typically 60 Hz, but may be 50 Hz or other frequencies depending on the source (e.g., the geographic location) for the supply of the current.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es