_:b2556251	<http://www.w3.org/2006/http#elementName>	"Keep-Alive" .
_:b2556251	<http://www.w3.org/2007/05/powder-s#describedby>	<http://localhost:8890/about/id/http/www.sdi4apps.eu/poi/> .
_:b2556251	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#HeaderElement> .