_:vb961610	<http://www.w3.org/2002/07/owl#unionOf>	_:vb961609 .
_:vb961610	<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#isPreconditionOf>	<http://www.w3.org/2000/01/rdf-schema#range>	_:vb961610 .