query: # Alternative query for the
    # President and First Lady of the United States
  
  SELECT ?pres ?presLabel ?wife ?wifeLabel WHERE {
     wd:Q30 wdt:P6 ?pres .
     ?pres wdt:P26 ?wife .
     SERVICE wikibase:label {
      bd:serviceParam wikibase:language "en" .
     }
   }