About: http://webisa.webdatacommons.org/168828883

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	Signals other than the 0??? signal and 90??? signal may be used assuming that the phase relationship between the two signals that are used is known.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com