About: http://webisa.webdatacommons.org/259509901

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	Similarly, a signal measured from the body may be of relatively low frequency, for example 20 kHz or less, such as 5 kHz or less, or 1 kHz or less.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es