About: http://webisa.webdatacommons.org/264087344

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	It is convenient to determine whether to poll in the present frame, since inputs to the system are constantly changing, for example as connections are added, dropped, or changed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com