_:vb51217	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#MessageHeader> .
_:vb51217	<http://www.w3.org/2006/http#fieldValue>	_:vb51218 .
_:vb51217	<http://www.w3.org/2006/http#fieldName>	<http://www.w3.org/2006/http-header#referrer-policy> .
_:vb51218	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#HeaderElement> .
_:vb51218	<http://www.w3.org/2006/http#elementName>	"no-referrer-when-downgrade" .