query-be017b4728b231489c9333a27b9971d4

rq turtle/ttl

Query for African-American librarians with no article on the English Wikipedia

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 bd: <http://www.bigdata.com/rdf#>
SELECT DISTINCT ?item ?itemLabel  
WHERE
{
?item wdt:P106/wdt:P279* wd:Q182436 ;
      wdt:P172 wd:Q49085 .

    # look for articles (sitelinks) 
    OPTIONAL { ?sitelink schema:about ?item . ?sitelink schema:inLanguage "en" }
    # but select items with no such article
    FILTER (!BOUND(?sitelink))

    # humans only
    ?item wdt:P31 wd:Q5 .

   SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v2("?item"):::projected v1("?sitelink") a1((" ")) c8(["en"]):::literal c3(["wd:Q182436"]):::iri c12(["bd:serviceParam"]):::iri c10(["wd:Q5"]):::iri c5(["wd:Q49085"]):::iri f0[["not bound(?sitelink)"]] f0 --> v1 v2 --"wdt:P106"--> a1 a1 --"wdt:P279"--> c3 v2 --"wdt:P172"--> c5 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v1 -."schema:about".-> v2 v1 --"schema:inLanguage"--> c8 end v2 --"wdt:P31"--> c10 subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c12 --"wikibase:language"--> c8 end