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However even these parks are losing habitat to livestock grazing , while the lower elevation parks ( Harar Wildlife Sanctuary , Awash National Park , Omo National Park , and Nechisar National Park ) are even less secure .
 Harar Wildlife Sanctuary, Awash National Park, Omo National Park, Nechisar National Park
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:
 Harar Wildlife Sanctuary, Awash National Park, Omo National Park, Nechisar National Park