query: SELECT ?item (SAMPLE(COALESCE(?en_label, ?item_label)) as ?label)
  WHERE
  {
  	?item wdt:P31 wd:Q26877490 .
    OPTIONAL {?item rdfs:label ?en_label . FILTER(LANG(?en_label) = "en")}
    OPTIONAL {?item rdfs:label ?item_label}
  } group by ?item