query: SELECT ?item ?itemLabel ?constituencyLabel ?groupLabel ?starttime WHERE {
    ?item p:P39 ?position;
      wdt:P31 wd:Q5.
    ?position ps:P39 wd:Q98077491;
      pq:P768 ?constituency;
      pq:P580 ?starttime;
      pq:P4100 ?group.
  }