59864
Their numbers have significantly increased , and since the islands are not large enough to sustain such high koala numbers , overbrowsing has become a problem .
 overbrowsing
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:
 overbrowsing