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An example of a prefectural flag is that of Nagano , where the orange " katakana " character ナ ( " na " ) appears in the center of a white disc. One interpretation of the " mon " is that the " na " symbol represents a mountain and the white disc , a lake .
 Nagano
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Nagano