_:vb54161	<http://www.w3.org/ns/r2rml#column>	"Timestamp" .
_:vb54160	<http://www.w3.org/ns/r2rml#constant>	<http://demo.openlinksw.com/schemas/School/timestamp> .
_:vb54160	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"45" .
_:vb54161	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"45" .
_:vb54159	<http://www.w3.org/ns/r2rml#predicateMap>	_:vb54160 .
_:vb54159	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"45" .
_:vb54159	<http://www.w3.org/ns/r2rml#objectMap>	_:vb54161 .