Subject ​	Predicate ​	Object ​	Graph ​
qb:sliceStructure http://purl.org/linked-data/cube#sliceStructure	rdfs:comment http://www.w3.org/2000/01/rdf-schema#comment	indicates the sub-key corresponding to this slice @en	http://purl.org/linked-data/cube# http://purl.org/linked-data/cube#