Differences in Blazegraph and RDF if Property is not existing

Currently (in the mat-o-lab instance), an Object Property has to exist (as Instance of "ObjectProperty"), such that is available in Blazegraph.
For the RDF of a page it does not -- therefore, currently the graph-tool shows different behavior than a Blazegraph/Sparql backend. 

Avisioned solutions:
* check if all packages are correctly installed / manually create the property. 