query-1e8baa84dea865698815c04943ec6134

rq turtle/ttl

Randomly (?) working queryThis query works fine to research data on people such as Cristiano Ronaldo, Angela Merkel or Alice Cooper, but it doesn't for other people (e.g. finds nothing for Eileen Bennett, finds Serena William when searching for Bob Ross). Can anybody fix it and help me understand the problem?

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX psv: <http://www.wikidata.org/prop/statement/value/>
PREFIX p: <http://www.wikidata.org/prop/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT DISTINCT ?item ?itemLabel ?genderLabel ?giorno_nascita ?mese_nascita ?anno_nascita ?image
   WHERE {
     ?item ?label "Cristiano Ronaldo";
           wdt:P31 wd:Q5;
           wdt:P21 ?gender;
           wdt:P569 ?dob.
     BIND(day(?dob) as ?giorno_nascita).
     BIND(month(?dob) as ?mese_nascita).
     BIND(year(?dob) as ?anno_nascita).

     OPTIONAL {?item wdt:P18 ?image.}
     MINUS {
       ?item p:P570 ?statement_1.
       ?statement_1 psv:P570 ?statementValue_1.
       ?statementValue_1 wikibase:timeValue ?P570_1.
     }
   SERVICE wikibase:label {bd:serviceParam wikibase:language "it"}
 }

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v11("?P570_1") v7("?anno_nascita"):::projected v4("?dob") v3("?gender") v5("?giorno_nascita"):::projected v8("?image"):::projected v1("?item"):::projected v2("?label") v6("?mese_nascita"):::projected v10("?statementValue_1") v9("?statement_1") c1(["Cristiano Ronaldo"]):::literal c13(["it"]):::literal c11(["bd:serviceParam"]):::iri c3(["wd:Q5"]):::iri v1 -->v2--> c1 v1 --"p:direct/P31"--> c3 v1 --"p:direct/P21"--> v3 v1 --"p:direct/P569"--> v4 bind0[/"day-from-dateTime(?dob)"/] v4 --o bind0 bind0 --as--o v5 bind1[/"month-from-dateTime(?dob)"/] v4 --o bind1 bind1 --as--o v6 bind2[/"year-from-dateTime(?dob)"/] v4 --o bind2 bind2 --as--o v7 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v1 -."p:direct/P18".-> v8 end subgraph minus3["MINUS"] style minus3 stroke-width:6px,fill:pink,stroke:red; v1 --"p:P570"--> v9 v9 --"p:statement/value/P570"--> v10 v10 --"wikibase:timeValue"--> v11 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c11 --"wikibase:language"--> c13 end