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It was through his influence that the city obtained its civic charter in 1563 , modeled after that of Riga .
 location: Riga
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Riga 
Answer:
 location: Riga