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Following unification , historical records show that a total of 300,000 conscript soldiers and 500,000 conscript labourers constructed the Great Wall of China .
 location: Great Wall of China
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Great Wall of China 
Answer:
 location: Great Wall of China