About: http://webisa.webdatacommons.org/246501584

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 frequency components of a progressively scanned video signal appear repeatedly around multiples of 60 Hz in the temporal direction and multiples of 525 cpH in the vertical direction, in regions such as region 2.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com