About: http://webisa.webdatacommons.org/69413273

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	750 people is a relatively small sample, yes, but it remains likely that provided it was done properly (and I see no evidence to suggest it wasn't) it should give a reasonably accurate figure.
http://www.w3.org/ns/prov#wasQuotedFrom	airliners.net