Display a map on facet page when an indirect OpenStreetMap relationship exists

[hangy]

What

• Follow-up to Display a map on facet page when an OpenStreetMap relationship exists #390

• In Display a map on facet page when an OpenStreetMap relationship exists #390, the task was to add a map to those categories/label/… where the taxonomy tag was linked to a Wikidata entry that had a direct OpenStreetMap relation property. This is about adding a map to those taxonomy tags that are linked to a Wikidata entry, which is indirectly linked to an OSM relation.

• For example, Feta has a protected designation of origin (Wikidata: P1389=Q13439060), so that it's country of origin (P495 = Q41 (Greece)), which resolves to the OSM relation (P402) 192307, could be shown on a map.

Part of

[hangy]

Unfortunately, using the country of origin is not enough. Parma ham (Q13360207) can only be produced in Parma (Q16228), but Wikidata currently does not seem to have a property to specify the protected region, right now.