63493
This may result either from natural causes or due to anthropogenic ( human ) causes , but the risks of extinction through natural disaster , such as a meteorite impact or large-scale volcanism , are generally considered to be comparatively low .
 meteorite impact
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:
 meteorite impact