About: http://webisa.webdatacommons.org/238629951

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	Selection bias is a problem, but it is a different problem from sample error, which margins-of-error deal with.
http://www.w3.org/ns/prov#wasQuotedFrom	metafilter.com