query: PREFIX wd: <http://www.wikidata.org/entity/>
  PREFIX wdt: <http://www.wikidata.org/prop/direct/>
  PREFIX wikibase: <http://wikiba.se/ontology#>
  PREFIX gas: <http://www.bigdata.com/rdf/gas#>
  
  SELECT ?actor ?actorLabel {
    { SERVICE gas:service {
       gas:program gas:gasClass "com.bigdata.rdf.graph.analytics.SSSP" ;
       gas:in wd:Q106418 ; gas:target wd:Q6504975 ; gas:out ?actor ; gas:out1 ?depth ; gas:linkType wdt:P161 ; gas:traversalDirection "Undirected" .
      }
    }
    SERVICE wikibase:label {bd:serviceParam wikibase:language "fr,en,it" }              
  } 
  order by ?depth
  