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The first and only modafinil products was approved in November 2017 , but its marketing status in mainland China is still unknown .
 location: 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: China 
Answer:
 location: China