query: #Airports named after people
  #2016-12-20, Jura1
  SELECT ?countryLabel ?item ?itemLabel ?itemDescription ?person ?personLabel ?personDescription (sample(?coor) as ?coor)
  {
    	?item wdt:P31/wdt:P279* wd:Q1248784 .
      ?item p:P138/ps:P138 ?person .
    	?person wdt:P31 wd:Q5 . 
    	?item wdt:P17 ?country .
    	OPTIONAL { ?item wdt:P625 ?coor } .
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "en" . }
  }
  GROUP BY ?countryLabel ?item ?itemLabel ?itemDescription ?person ?personLabel ?personDescription
  ORDER BY ?countryLabel ?itemLabel
  LIMIT 1000