_:b60516413	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Restriction> .
_:b60516413	<http://www.w3.org/2002/07/owl#onProperty>	<http://schema.org/identifier> .
_:b60516413	<http://www.w3.org/2002/07/owl#maxCardinality>	"1"^^<http://www.w3.org/2001/XMLSchema#int> .