_:vb55513	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#MessageHeader> .
_:vb55513	<http://www.w3.org/2006/http#fieldName>	<http://www.w3.org/2006/http-header#if-modified-since> .
_:vb55514	<http://www.w3.org/2006/http#elementName>	"Mon, 04 Nov 2019 06:09:43 GMT" .
_:vb55513	<http://www.w3.org/2006/http#fieldValue>	_:vb55514 .
_:vb55514	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#HeaderElement> .