_:vb868176	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Restriction> .
_:vb868176	<http://www.w3.org/2002/07/owl#minCardinality>	"0"^^<http://www.w3.org/2001/XMLSchema#integer> .
<http://www.w3.org/2002/12/cal/ical#Vfreebusy>	<http://www.w3.org/2000/01/rdf-schema#subClassOf>	_:vb868176 .
_:vb868176	<http://www.w3.org/2002/07/owl#onProperty>	<http://www.w3.org/2002/12/cal/ical#duration> .