query: embed.html#SELECT ?item ?itemLabel ?genderLabel
  WHERE 
  {
    ?item wdt:P31 wd:Q22989102.
    OPTIONAL{?item wdt:P21 ?gender .}
    SERVICE wikibase:label { bd:serviceParam wikibase:language "ca". }
     FILTER(EXISTS {
     ?item rdfs:label ?lang_label.
     FILTER(LANG(?lang_label) = "ca")
   })
  }
  ORDER BY ?itemLabel