query: select ?item ?itemLabel ?IN ?IN_collection ?IN_reference_url ?IN_stated_in ?IN_retrieved
  where {
    ?item p:P195 ?st .
    ?st  ps:P195 wd:Q1526131 .
    ?st pq:P2868 wd:Q29188408
    OPTIONAL {?item wdt:P217 ?IN.}  
    OPTIONAL {?item p:P217 [prov:wasDerivedFrom [pr:P854 ?IN_reference_url]] .} 
    OPTIONAL {?item p:P217 [pq:P195 ?IN_collection].} 
    OPTIONAL {?item p:P217 [prov:wasDerivedFrom [pr:P248 ?IN_stated_in]] .} 
    OPTIONAL {?item p:P217 [prov:wasDerivedFrom [pr:P813 ?IN_retrieved]] .} 
    SERVICE wikibase:label { bd:serviceParam wikibase:language "nl". }
  } ORDER BY ?itemLabel