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A number of prominent politicians are represented by characters from the " Alice " books : Clara ( the equivalent of Alice ) represents Arthur Balfour , the Leader of the House of Commons ; the Red Queen is Joseph Chamberlain , the Duchess is Robert Cecil , Crumpty-Bumpty is Henry Campbell-Bannerman , the Walrus is William Vernon Harcourt , the Dalmeny Cat is Lord Rosebery , and the Caterpillar is Winston Churchill .
 Arthur Balfour, Joseph Chamberlain, Robert Cecil, Henry Campbell-Bannerman, William Vernon Harcourt, Lord Rosebery, Winston Churchill
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Arthur Balfour, Joseph Chamberlain, Robert Cecil, Henry Campbell-Bannerman, William Vernon Harcourt, Lord Rosebery, Winston Churchill