_:vb51115099	<http://www.openlinksw.com/schemas/virtrdf#bnode-row>	"237" .
_:vb51115099	<http://www.w3.org/ns/r2rml#datatype>	<http://www.w3.org/2001/XMLSchema#integer> .
_:vb51115099	<http://www.w3.org/ns/r2rml#column>	"drive_quarter_start" .