query two RDF graphs

Hi,

I am loading two RDF graphs and what I want to do is query them both at the
same time.
rdf_load( FilePaths, [ graph(graphInstance) ] )
rdf_load( FilePaths, [ graph(graphInstance) ] )

So, I tried like :
rdf(X,_,_,[graphSchema, graphInstance]).

but it didn't work, how could I do it?

Batselem
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