query: #exhibitions in the Colonial museum (former ethnological museum in Haarlem)
  SELECT ?item ?itemLabel 
  WHERE 
  {
    { ?item wdt:P31 wd:Q29023906 . } #temporary exhibition/tentoonstelling
    UNION 
    { ?item wdt:P31 wd:Q464980 . } #exhibition/opstelling in vaste collection
    ?item wdt:P276 wd:Q51871893 .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "nl,en". }
  }