84752
Muskie were introduced to western Saint John River in the late 1960 s and have now spread to many connecting waterways in northern Maine .
 Saint John River, Maine
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:
 Saint John River, Maine