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US capital corporations have become the corporations with the most profits among Tianjin ' s foreign merchant investment corporations .
 US, Tianjin, US capital corporations, the corporations with the most profits among Tianjin ' s foreign merchant investment corporations, Tianjin ' s foreign merchant investment corporations, foreign merchant
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 US, Tianjin, US capital corporations, the corporations with the most profits among Tianjin ' s foreign merchant investment corporations, Tianjin ' s foreign merchant investment corporations, foreign merchant