query-9fbcf43709a6000652f806ab90bfa06f

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT DISTINCT ?item ?itemLabel ?date_of_birth ?date_of_death
WHERE
{
  VALUES ?occupation { wd:Q15296811 wd:Q329439 wd: wd:Q11569986 }

  ?item wdt:P31 wd:Q5 . # ?item is human
  ?item wdt:P106/wdt:P279* ?occupation . # item's occupation is draughtsman or engraver
  {
    ?item wdt:P734 wd:Q1158605 . # item's family name is Walker
  }
#  UNION
#  {
#    ?item rdfs:label ?label .
#    FILTER CONTAINS(?label, "Walker")
#  }
  BIND(IF(IsLiteral(?dod), ?dod, "Somevalue") AS ?date_of_death)
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  OPTIONAL { ?item wdt:P569 ?dob . BIND(IF(IsLiteral(?dob), ?dob, "Somevalue") AS ?date_of_birth) }
  OPTIONAL { ?item wdt:P570 ?dod . BIND(IF(IsLiteral(?dod), ?dod, "Somevalue") AS ?date_of_death) }
}

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v5("?date_of_birth"):::projected v7("?date_of_death"):::projected v4("?dob") v6("?dod") v2("?item"):::projected v1("?occupation") a1((" ")) c8(["bd:serviceParam"]):::iri c6(["wd:Q1158605"]):::iri c2(["wd:Q5"]):::iri c10(["#91;AUTO_LANGUAGE#93;,en"]):::literal bind0[/VALUES ?occupation/] bind0-->v1 bind00(["wd:Q15296811"]) bind00 --> bind0 bind01(["wd:Q329439"]) bind01 --> bind0 bind02(["wd:"]) bind02 --> bind0 bind03(["wd:Q11569986"]) bind03 --> bind0 v2 --"wdt:P31"--> c2 v2 --"wdt:P106"--> a1 a1 --"wdt:P279"--> v1 v2 --"wdt:P734"--> c6 bind1[/"if(isLiteral(?dod),?dod,'Somevalue')"/] v6 --o bind1 bind1 --as--o v7 subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c8 --"wikibase:language"--> c10 end subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v2 -."wdt:P569".-> v4 bind2[/"if(isLiteral(?dob),?dob,'Somevalue')"/] v4 --o bind2 bind2 --as--o v5 end subgraph optional1["(optional)"] style optional1 fill:#bbf,stroke-dasharray: 5 5; v2 -."wdt:P570".-> v6 bind3[/"if(isLiteral(?dod),?dod,'Somevalue')"/] v6 --o bind3 bind3 --as--o v7 end