About: http://webisa.webdatacommons.org/377502548

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	So, every time a post is saved, the plugin just checks, whether there is an excerpt or not.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.org