query: #expeditions with participants with a NMVW-id
  #expeditions with participants with a NMVW-id
  SELECT ?participant ?participantLabel ?idnummer ?item ?itemLabel 
  WHERE 
  {
    ?item (wdt:P31/wdt:P279*) wd:Q2401485.
    ?item wdt:P710 ?participant .
    ?participant wdt:P7831 ?idnummer .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "nl,en". }
  }
  order by ASC(?participantLabel)