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Ice floes form due to the large amount of freshwater from the Amur River , lowering the salinity of upper levels , often raising the freezing point of the sea surface .
 location: Amur River
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: Amur River 
Answer:
 location: Amur River