About: http://webisa.webdatacommons.org/61192847

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 program signal 18 may be modulated at any suitable frequency, such as radio or optical frequencies, using any suitable modulation algorithm, such as quadrature amplitude modulation (QAM).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com