About: http://webisa.webdatacommons.org/157726289

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	Particular navigation buttons do not appear if they have no meaning for the current page, e.g. the page for the first index node in an index level does not have <first> and <previous> buttons.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca