_:b2555931	<http://www.w3.org/2006/http#elementName>	"Upgrade, Keep-Alive" .
_:b2555914	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#MessageHeader> .
_:b2555914	<http://www.w3.org/2006/http#fieldName>	<http://www.w3.org/2006/http-header#connection> .
_:b2555931	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#HeaderElement> .
_:b2555914	<http://www.w3.org/2006/http#fieldValue>	_:b2555931 .