dcausse added a comment.

    select ?p (count(*)as ?cnt) {
      ?s ?p ?o .
      filter (isBlank(?s))
    }
    group by ?p
  
  output is at P9862 <https://phabricator.wikimedia.org/P9862>
  
  and as expected we only see the corresponding subjects of the owl constraint 
on `owl:complementOf` (`rdf:type`, `owl:onProperty` and `owl:someValuesFrom`) 
as exported by the wikibase today:
  
    wdno:P31 a owl:Class ;
        owl:complementOf _:genid1 .
    
    _:genid1 a owl:Restriction ;
        owl:onProperty wdt:P31 ;
        owl:someValuesFrom owl:Thing .
  
  @Igorkim78 could you take a look?

TASK DETAIL
  https://phabricator.wikimedia.org/T239414

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To: dcausse
Cc: Smalyshev, Lucas_Werkmeister_WMDE, Igorkim78, dcausse, Aklapper, 
darthmon_wmde, DannyS712, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, 
EBjune, merbst, LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, 
jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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