query-b64499ae4e22d7a2757c7e45db69c4ef

rq turtle/ttl

list of portraits with author and subject SELECT ?item ?itemLabel ?author ?authorLabel ?subject ?subjectLabel WHERE {
?item wdt:P361 wd:Q30091381 .
hint:Prior hint:runFirst "true"^^xsd:boolean. ?item wdt:P50 ?author . OPTIONAL { ?item wdt:P921 ?subject . } SERVICE wikibase:label { bd:serviceParam wikibase:language "fr,en". } }

Use at

https://query.wikidata.org/sparql

PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
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#>
# list of portraits with author and subject
SELECT ?item ?itemLabel ?author ?authorLabel ?subject ?subjectLabel
WHERE {  
  ?item wdt:P361 wd:Q30091381 .  

  ?item wdt:P50 ?author . 
  OPTIONAL { ?item wdt:P921 ?subject . }
  SERVICE wikibase:label { bd:serviceParam wikibase:language "fr,en". }
}

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v2("?author"):::projected v1("?item"):::projected v3("?subject"):::projected c6(["bd:serviceParam"]):::iri c8(["fr,en"]):::literal c2(["wd:Q30091381"]):::iri v1 --"wdt:P361"--> c2 v1 --"wdt:P50"--> v2 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P921".-> v3 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c6 --"wikibase:language"--> c8 end