query: SELECT DISTINCT ?item ?title ?seats ?jurisdiction (YEAR(?inception) AS ?start) (YEAR(?dissolution) AS ?end) WHERE {
    ?item wdt:P31/wdt:P279* wd:Q1752346 .
    OPTIONAL { ?item wdt:P1342 ?seats . }
    OPTIONAL {
      ?item wdt:P1001 ?j .
      ?j rdfs:label ?jurisdiction filter (lang(?jurisdiction) = "en") .
    }
    OPTIONAL { ?item wdt:P571 ?inception . }
    OPTIONAL { ?item wdt:P576 ?dissolution . }
    OPTIONAL { ?item rdfs:label ?title filter (lang(?title) = "en") . }
  } ORDER BY DESC(?seats) ?title