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Another great bird dog is the Retriever ; this dog is an all-around good bird dog , this dog will flush birds from groves and hedges so that the hunter can shoot and the dog will retrieve .
 Retriever
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:
 Retriever