79537
The native swans have benefited from removal of non-native mute swans by the Michigan Department of Natural Resources beginning in the 1960 s , with a decline from 15,000 mute swans in 2010 to 8,700 in 2015 .
 Michigan Department of Natural Resources
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Michigan Department of Natural Resources