_:vb50911258	<http://www.w3.org/ns/r2rml#tableSchema>	"Demo" .
_:vb50911258	<http://www.w3.org/ns/r2rml#tableOwner>	"kg" .
_:vb50911258	<http://www.w3.org/ns/r2rml#tableName>	"physical" .