_:vb50574214	<http://www.w3.org/2007/05/powder-s#describedby>	<http://demo.openlinksw.com/about/id/entity/http/www.techedu.life/> .
_:vb50574214	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	"https://schema.org/SiteNavigationElement" .