Hi!
What's the URL of the dataset loaded into your Blazegraph DBMS? Ideally, we should have this data available from a variety of SPARQL Query Services [1].
The data is from https://dumps.wikimedia.org/wikidatawiki/entities/ plus streaming updates from Wikidata. You can see RDF format description at https://www.mediawiki.org/wiki/Wikibase/Indexing/RDF_Dump_Format