About: http://webisa.webdatacommons.org/420098590

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	On social networking sites such as Twitter, it is attached to keywords or phrases so as to identify messages on a particular topic (e.g. #volcano; #Iceland).
http://www.w3.org/ns/prov#wasQuotedFrom	oxforddictionaries.com