Smalyshev created this task.
Smalyshev claimed this task.
Smalyshev added a subscriber: Smalyshev.
Smalyshev added a project: Wikidata-Query-Service.
Herald added a subscriber: Aklapper.
Herald added projects: Wikidata, Discovery.

TASK DESCRIPTION
  This query:
  ```
  prefix pr: <http://www.wikidata.org/prop/reference/>
  PREFIX wd: <http://www.wikidata.org/entity/>
  PREFIX wdt: <http://www.wikidata.org/prop/direct/>
  PREFIX wikibase: <http://wikiba.se/ontology#>
  PREFIX p: <http://www.wikidata.org/prop/>
  PREFIX v: <http://www.wikidata.org/prop/statement/>
  PREFIX q: <http://www.wikidata.org/prop/qualifier/>
  PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
  PREFIX prov: <http://www.w3.org/ns/prov#> 
  
  SELECT ?work ?workLabel ?author ?authorLabel ?genre ?location ?locationLabel 
?geo ?location_statement ?citat  WHERE {
    ?work wdt:P31/wdt:P279* wd:Q386724 . 
    ?work wdt:P50 ?author .
    ?work p:P840 ?location_statement .
    ?location_statement v:P840 ?location .
    ?location wdt:P17 wd:Q35 .
    ?location wdt:P625 ?geo . 
    OPTIONAL {
      ?location_statement prov:wasDerivedFrom ?ref .
      ?ref pr:P1683 ?citat .
    }
  } ORDER BY ?work ?author
  ```
  
  causes NotMaterializedException in Blazegraph 2.0.

TASK DETAIL
  https://phabricator.wikimedia.org/T125900

EMAIL PREFERENCES
  https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Smalyshev
Cc: Aklapper, Smalyshev, debt, Gehel, Izno, jkroll, Wikidata-bugs, Jdouglas, 
aude, Deskana, Manybubbles, Mbch331



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