_:b2556405	<http://www.w3.org/2006/http#elementName>	"Virtuoso/07.20.3230 (Linux) x86_64-generic_glibc25-linux-gnu" .
_:b2556405	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/http#HeaderElement> .