I am new to SPARQL, and I need to write Sparql query to retrieve all the entities and links that DBpedia use from the Ordnance Survey ontologies. In words, I need to find out, how DBpedia is linked to Ordnance ontologies and how DBpedia incorporates with it in terms of Geospatial data ?. Also, what kind of data dose the DBpedia use from ordnance survey ?