query-4f49f436497323c9562cc656b7641b77

rq turtle/ttl

Query is malformed: Bad aggregate

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?profession ?professionLabel ?female_form_of_label WHERE {
  SERVICE wikibase:label { bd:serviceParam wikibase:language "de,[AUTO_LANGUAGE]". }
  ?profession wdt:P31 wd:Q28640.
  OPTIONAL { ?profession wdt:P2521 ?female_form_of_label. }
}
GROUP BY ?profession ?professionLabel
ORDER BY ?profession ?professionLabel

Query found at