query-3e048567b1adc8523ae3cb7366a05f11

PREFIX prov: <http://www.w3.org/ns/prov#>
PREFIX pr: <http://www.wikidata.org/prop/reference/>
PREFIX p: <http://www.wikidata.org/prop/>
select ?item where {
  ?item p:P91 [
    prov:wasDerivedFrom ?ref
  ] .
  ?ref pr:P143 [] .
  filter not exists {
    ?item p:P91 [
     prov:wasDerivedFrom ?ref2 
    ] 
    filter (?ref2 != ?ref ) 
    filter not exists { ?ref2 pr:P143 [] } .
  }
}

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v3("?item"):::projected v2("?ref") v1("?ref2") a4((" ")) a1((" ")) a3((" ")) a2((" ")) f0[["not "]] subgraph f0e0["Exists Clause"] e0f0[["not "]] subgraph e0f0e0e0["Exists Clause"] e0e0v1 --"p:reference/P143"--> e0e0a1 e0e0v1("?ref2"):::projected e0e0a1((" ")):::projected end e0f0--EXISTS--> e0f0e0e0 e0f0 --> e0v1 e0f0 --> e0c1 e0f0 --> e0a1 e0v1 --"p:reference/P143"--> e0a1 e0f1[["?ref2 != ?ref"]] e0f1 --> e0v1 e0f1 --> e0v2 e0a2 --"prov:wasDerivedFrom"--> e0v1 e0v3 --"p:P91"--> e0a2 e0v3("?item"):::projected e0v2("?ref"):::projected e0v1("?ref2"):::projected e0a1((" ")):::projected e0a2((" ")):::projected end f0--EXISTS--> f0e0 f0 --> v1 f0 --> c1 f0 --> a1 f0 --> v2 f0 --> a2 f0 --> c2 f0 --> v3 f0 --> c3 f1[["not "]] subgraph f1e1["Exists Clause"] e1v1 --"p:reference/P143"--> e1a1 e1v1("?ref2"):::projected e1a1((" ")):::projected end f1--EXISTS--> f1e1 f1 --> v1 f1 --> c1 f1 --> a1 v1 --"p:reference/P143"--> a1 f2[["?ref2 != ?ref"]] f2 --> v1 f2 --> v2 a2 --"prov:wasDerivedFrom"--> v1 v3 --"p:P91"--> a2 a3 --"prov:wasDerivedFrom"--> v2 v3 --"p:P91"--> a3 v2 --"p:reference/P143"--> a4