query: PREFIX p: <http://www.wikidata.org/prop/>
  PREFIX v: <http://www.wikidata.org/prop/statement/>
  PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
  
  SELECT ?team ?teamLabel (SAMPLE(?countryName) AS ?country) (COUNT(?player) AS ?playerCount) (GROUP_CONCAT(DISTINCT(?playerName);separator=", ") AS ?players) WHERE {
    ?team wdt:P31 wd:Q24199684 .
    OPTIONAL{?team wdt:P31 ?nationalTeam . ?nationalTeam wdt:P31 wd:Q6979593 . ?nationalTeam wdt:P1532 ?country . ?country rdfs:label ?countryName . FILTER(lang(?countryName) = "en")}
    OPTIONAL{?team wdt:P710 ?player . ?player rdfs:label ?playerName . FILTER(lang(?playerName) = "en")}
    SERVICE wikibase:label{bd:serviceParam wikibase:language "en,de"}
  }
  GROUP BY ?team ?teamLabel
  ORDER BY ?playerCount