About: http://webisa.webdatacommons.org/175325790

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	Historically, there are a limited number of modulations available and systems are typically built around one.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk