_:vb4715717	<http://www.w3.org/2006/time#inXSDDate>	"1957-12"^^<http://www.w3.org/2001/XMLSchema#gYearMonth> .
_:vb4715717	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/time#Instant> .