About: http://webisa.webdatacommons.org/401728963

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	This would mean that the best estimate would be less than $2N+1$, because it is always possible for $N$ to contain an article, other than the one you were looking for, to be repeated multiple times.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com