About: http://webisa.webdatacommons.org/1830012

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	But here language is a noun and it is single, so it is not working as a mass noun (as per my opinion) so I have not got my answer yet or maybe I am not able to understand the points you are making (I am so sorry).
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com