About: http://webisa.webdatacommons.org/269250503

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	An official letter has a certain format, and require the use of specific sentences such as introductory and closing sentences, sentences of thanks, apologies, requests, and various other types of sentences.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com