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Cullather 's study of Philippines – United States relations , " Based on extensive research in U.S. and Philippine archives " , was the subject of his 1994 book Illusions of Influence : The Political Economy of United States-Philippines Relations , 1942-1960 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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