PREFIX era: PREFIX dc: PREFIX xsd: SELECT DISTINCT ?id ?inCountry ?totalLengthKm { GRAPH { {SELECT DISTINCT ?inCountry (round(xsd:decimal(SUM(?length)/1000)) AS ?totalLengthKm) WHERE { ?element a ?y . # currently includes sections of line and tunnels ?element era:length ?length . ?element era:inCountry ?inCountry. }} SERVICE { ?inCountry dc:identifier ?id} } }