About: http://webisa.webdatacommons.org/166740883

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	The frequencies for carrying data, i.e. ones and zeros, on the Z signal are referred to as the mark and space frequencies.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es