About: http://webisa.webdatacommons.org/183334140

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	Looking at the map which you republished from the Washington Post it would seem to me that the problem is mainly concentrated in areas where property has been built as a speculative investment, e.g. Florida.
http://www.w3.org/ns/prov#wasQuotedFrom	ritholtz.com