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Line 1 of the Tianjin Metro ( ) runs 26.2 km from the north-west to the south-east of downtown Tianjin and serves 22 stations .
 location: Tianjin; location: Tianjin
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: Tianjin, Tianjin 
Answer:
 location: Tianjin; location: Tianjin