About: http://webisa.webdatacommons.org/23153257

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 most common frequencies used are as follows; 0.5 Hz, 1.5 Hz, 10 Hz, 100 Hz.
http://www.w3.org/ns/prov#wasQuotedFrom	hackcanada.com