query-6849257611c4407d9f9a5be5d7cd1512

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX ps: <http://www.wikidata.org/prop/statement/>
PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
PREFIX p: <http://www.wikidata.org/prop/>
PREFIX bd: <http://www.bigdata.com/rdf#>
#defaultView:Map
SELECT  ?employer ?employerLabel ?item ?itemLabel ?coord ?layer ?startyear ?length {
  ?item p:P106 ?wir .
  ?wir ps:P106 wd:Q3809586 .
  OPTIONAL { ?wir pq:P582 ?end }
  OPTIONAL { ?wir pq:P580 ?start }
  BIND(CONCAT('duration:', STR(MONTH(?end-?start)), 'months') AS ?length) # <- how would one calculate the duration of ?end-?start`
  BIND(IF(!BOUND(?end),   'no end date',   CONCAT('end: ',   STR(YEAR(?end))))   AS ?layer)
  BIND(IF(!BOUND(?start), 'no start date', CONCAT('start: ', STR(YEAR(?start)))) AS ?startyear)
  OPTIONAL { ?wir pq:P937 ?location. ?location wdt:P625 ?coord. }
  OPTIONAL { ?wir pq:P108 ?employer }
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}
ORDER BY DESC(?end)

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v9("?coord"):::projected v10("?employer"):::projected v1("?end") v2("?item"):::projected v6("?layer"):::projected v5("?length"):::projected v8("?location") v4("?start") v7("?startyear"):::projected v3("?wir") c10(["bd:serviceParam"]):::iri c12(["#91;AUTO_LANGUAGE#93;,en"]):::literal c3(["wd:Q3809586"]):::iri v2 --"p:P106"--> v3 v3 --"p:statement/P106"--> c3 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v3 -."p:qualifier/P582".-> v1 end subgraph optional1["(optional)"] style optional1 fill:#bbf,stroke-dasharray: 5 5; v3 -."p:qualifier/P580".-> v4 end bind0[/"concat('duration:',str(month-from-dateTime(?end - ?start)),'months')"/] v1 --o bind0 v4 --o bind0 bind0 --as--o v5 bind1[/"if(not bound(?end),'no end date',concat('end: ',str(year-from-dateTime(?end))))"/] v1 --o bind1 bind1 --as--o v6 bind2[/"if(not bound(?start),'no start date',concat('start: ',str(year-from-dateTime(?start))))"/] v4 --o bind2 bind2 --as--o v7 subgraph optional2["(optional)"] style optional2 fill:#bbf,stroke-dasharray: 5 5; v3 -."p:qualifier/P937".-> v8 v8 --"p:direct/P625"--> v9 end subgraph optional3["(optional)"] style optional3 fill:#bbf,stroke-dasharray: 5 5; v3 -."p:qualifier/P108".-> v10 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c10 --"wikibase:language"--> c12 end