query: SELECT ?item ?itemLabel ?start ?end
  WHERE {
    ?item p:P39 ?positionStatement .
    ?positionStatement ps:P39 ?position .
    ?position wdt:P31* wd:Q10655178 .
    ?positionStatement pq:P580 ?start .
    ?positionStatement pq:P582 ?end .
  
    BIND(YEAR(?start) AS ?startYear) .
    BIND(YEAR(?end) AS ?endYear) .
    
    FILTER(?endYear - ?startYear > 4)
    FILTER(?startYear > 1989)
  
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }