_:vb53498	<http://www.w3.org/2006/http#fieldValue>	_:vb53499 .
_:vb53499	<http://www.w3.org/2006/http#elementName>	"224" .
_:vb53498	<http://www.w3.org/2006/http#fieldName>	<http://www.w3.org/2006/http-header#x-envoy-upstream-service-time> .
_:vb53499	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#HeaderElement> .
_:vb53498	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#MessageHeader> .