query-8ef9aecd98ba58f74b5b7c5b726a60a6

rq turtle/ttl

Did you consider variable scope problems? These (constructed) queries have different output:

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX schema: <http://schema.org/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT * WHERE 
{
  ?item wdt:P31 wd:Q4167836 ; wdt:P971 wd:Q36224 .
  [] schema:about ?item  ; schema:isPartOf / wikibase:wikiGroup "wiktionary" ; schema:inLanguage ?lang ; schema:name ?title
  FILTER NOT EXISTS { ?item rdfs:label ?l . FILTER (lang(?l)=?lang  ) }
}
LIMIT 250000

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v3("?item"):::projected v1("?l") v2("?lang"):::projected v4("?title"):::projected a1((" ")) a2((" ")) c5(["wd:Q36224"]):::iri c9(["wiktionary"]):::literal c3(["wd:Q4167836"]):::iri f0[["not "]] subgraph f0e0["Exists Clause"] e0f0[["?l = ?lang"]] e0f0 --> e0v1 e0f0 --> e0v2 e0v3 --"rdfs:label"--> e0v1 e0v3("?item"):::projected e0v1("?l"):::projected e0v2("?lang"):::projected end f0--EXISTS--> f0e0 f0 --> v1 f0 --> v2 f0 --> v3 f0 --> c1 f1[["?l = ?lang"]] f1 --> v1 f1 --> v2 v3 --"rdfs:label"--> v1 v3 --"wdt:P31"--> c3 v3 --"wdt:P971"--> c5 a1 --"schema:about"--> v3 a1 --"schema:isPartOf"--> a2 a2 --"wikibase:wikiGroup"--> c9 a1 --"schema:inLanguage"--> v2 a1 --"schema:name"--> v4