_:vb18720	<http://www.w3.org/2002/07/owl#onProperty>	<http://www.openlinksw.com/schemas/xbrl/periodType> .
_:vb18720	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Restriction> .
_:vb18720	<http://www.w3.org/2002/07/owl#hasValue>	"duration" .