About: http://webisa.webdatacommons.org/114052947

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	You can use doc = Nokogiri::HTML.fragment(html) if you do not want Nokogiri to add the doctype and other html and body tags
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com