Find data source by a triple template

Context

We are trying to render rdf:type, and we cannot see its rdfs:label. To solve this, it is enough to download rdf ontology, and the address of that ontology is hidden within the rdf:type URL.
We want to render rdf:type with a label in Russian language; if Russian labels for RDF terms are stored in a separate file then we need to know
that we need an rdfs:label,
and we need to know that language must be @ru.

A function that determines the location of new data must know full triple template that we're trying to interpolate against the graph.