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Originally initiated by C. Fred Bergsten as primarily an economic relationship , it began to gain wider currency and scope from foreign policy experts as a term recognizing the centrality of the U.S.-China relationship near the beginning of the Obama Administration .
 C. Fred Bergsten, Obama
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 C. Fred Bergsten, Obama