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He defeated his Democratic rival William Jennings Bryan after a front porch campaign in which he advocated " sound money " ( the gold standard unless altered by international agreement ) and promised that high tariffs would restore prosperity .
 William Jennings Bryan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 William Jennings Bryan