three separate polls
...that Sir Anthony Eden was considered the least effective British Prime Minister of the 20th century in three separate polls?
...that <a href="./Anthony_Eden" id="mwAgk" rel="mw:WikiLink" title="Anthony Eden">Sir Anthony Eden</a> was considered the least effective <a href="./Prime_Minister_of_the_United_Kingdom" id="mwAgo" rel="mw:WikiLink" title="Prime Minister of the United Kingdom">British Prime Minister</a> of the 20th century in <b id="mwAgs"><a class="mw-redirect" href="./Historical_rankings_of_British_Prime_Ministers" id="mwAgw" rel="mw:WikiLink" title="Historical rankings of British Prime Ministers">three separate polls</a></b>?