_:b2556221 <http://www.w3.org/2007/05/powder-s#describedby> <http://localhost:8890/about/id/http/www.sdi4apps.eu/poi/> . _:b2556248 <http://www.w3.org/2006/http#elementName> "text/html" . _:b2556221 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2006/http#MessageHeader> . _:b2556248 <http://www.w3.org/2007/05/powder-s#describedby> <http://localhost:8890/about/id/http/www.sdi4apps.eu/poi/> . _:b2556221 <http://www.w3.org/2006/http#fieldName> <http://www.w3.org/2006/http-header#content-type> . _:b2556248 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2006/http#HeaderElement> . _:b2556221 <http://www.w3.org/2006/http#fieldValue> _:b2556248 .