95972
This may be a discrete occurrence ( for example , when mountaineers acclimate to high altitude over hours or days ) or may instead represent part of a periodic cycle , such as a mammal shedding heavy winter fur in favor of a lighter summer coat .
 mammal
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:
 mammal