query: select ?item ?itemLabel ?FullWorkURL ?FW_language ?FW_reference_url ?FW_stated_in ?FW_retrieved
  where {
    ?item p:P195 ?st .
    ?st  ps:P195 wd:Q1526131 .
    ?st pq:P2868 wd:Q29188408
    OPTIONAL {?item wdt:P953 ?FullWorkURL.}  
    OPTIONAL {?item p:P953 [prov:wasDerivedFrom [pr:P854 ?FW_reference_url]] .} 
    OPTIONAL {?item p:P953 [pq:P407 ?FW_language].} 
    OPTIONAL {?item p:P953 [prov:wasDerivedFrom [pr:P248 ?FW_stated_in]] .} 
    OPTIONAL {?item p:P953 [prov:wasDerivedFrom [pr:P813 ?FW_retrieved]] .} 
    SERVICE wikibase:label { bd:serviceParam wikibase:language "nl". }
  } ORDER BY ?itemLabel