3320
To the west , the north fork of the Flathead River forms the western boundary , while its middle fork is part of the southern boundary .
 location: Flathead River
Please list all entity words in the text that fit the category.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} 
Answer:
 location: Flathead River