query: SELECT DISTINCT ?depth ?descendant ?descendantLabel ?descendantDescription (YEAR(?dob) as ?yob) (YEAR(?dod) as ?yod) ?ids ?spouse_ids  ?sl ?spouse_sl
  WHERE
  {
    BIND( wd:Q75891071 as ?ancestor ) 
    SERVICE gas:service {
      gas:program gas:gasClass "com.bigdata.rdf.graph.analytics.SSSP" ;
                  gas:in wd:Q75891071 ;
                  gas:traversalDirection "Forward" ;
                  gas:out ?descendant ;
                  gas:out1 ?depth ;
                  gas:maxIterations 100 ;
                  gas:linkType wdt:P40 .
    }
    OPTIONAL { ?descendant wdt:P569 ?dob }
    OPTIONAL { ?descendant wdt:P570 ?dod }
    OPTIONAL { ?descendant wikibase:identifiers ?ids }
    SERVICE wikibase:label {bd:serviceParam wikibase:language "en,en" }
    OPTIONAL { ?descendant wdt:P26 / wikibase:identifiers ?spouse_ids }
    OPTIONAL { ?descendant wikibase:sitelinks ?sl }
    OPTIONAL { ?descendant wdt:P26 / wikibase:sitelinks ?spouse_sl }
  }
  ORDER BY ASC(?depth)
  LIMIT 1000