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Disheng Ye presented that Tianjin has a population of 9 . 4 million and is the biggest international harbor city and external trading shore in northern China .
 Tianjin, a population of 9 . 4 million, 9 . 4 million, the biggest international harbor city and external trading shore in northern China, Disheng Ye, international harbor, northern China
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:
 Tianjin, a population of 9 . 4 million, 9 . 4 million, the biggest international harbor city and external trading shore in northern China, Disheng Ye, international harbor, northern China