_:vb940877	<http://www.w3.org/2002/07/owl#unionOf>	_:vb940879 .
_:vb940877	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Class> .
<http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#hasPrecondition>	<http://www.w3.org/2000/01/rdf-schema#domain>	_:vb940877 .