148741
In the present time , howdahs are used mainly for tourist or commercial purposes in South East Asia , and are the subject of controversy as animal rights groups and organizations , such as Millennium Elephant Foundation , openly criticize the use of the howdah , citing information that howdahs can cause permanent damage to an elephant 's spine , lungs , and other organs and can significantly shorten the animal 's life .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None