About: http://webisa.webdatacommons.org/150936357

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	the name and dates of operation of every post office in the U.S. The list is the best reference ever published in one place.
http://www.w3.org/ns/prov#wasQuotedFrom	postalhistory.com