About: http://webisa.webdatacommons.org/252187765

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 filter 211, in turn, is a low-pass filter with an upper limit frequency of e.g. 1 to 5 Hz.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au