About: http://webisa.webdatacommons.org/84657232

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	In practice, a new difficulty value should be selected only on each Nth iteration or block 100, where N is a number sufficiently large so that the difficulty level does not change too often.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com