query: PREFIX wikibase: <http://wikiba.se/ontology#>
  PREFIX wd: <http://www.wikidata.org/entity/> 
  PREFIX wdt: <http://www.wikidata.org/prop/direct/>
  PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
  
  PREFIX p: <http://www.wikidata.org/prop/>
  PREFIX v: <http://www.wikidata.org/prop/statement/>
  
  SELECT ?chancellorLabel ?spouseLabel WHERE {
     ?chancellor wdt:P569 ?birthday .
     ?chancellor wdt:P39 wd:Q4970706 .
    
     ?chancellor p:P26 ?spouse_statement .
     ?spouse_statement v:P26 ?spouse .
                 
     SERVICE wikibase:label {
       bd:serviceParam wikibase:language "de" .
     }
  } ORDER BY ?birthday ?spouse