query: SELECT ?item ?ward ?party ?votes
  WHERE 
  {
    ?item p:P3602 ?ps .
    ?ps ps:P3602 wd:Q55137486 .
    OPTIONAL { ?ps pq:P102 ?party . }
    OPTIONAL { ?ps pq:P768 ?ward . }
    OPTIONAL { ?ps pq:P1111 ?votes . }
  }
  ORDER BY DESC(?votes)