39806
However , the American Ornithologists ' Union analyzed the film and concluded that they had probably filmed feral parakeets .
 organization: American Ornithologists ' Union
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: American Ornithologists ' Union 
Answer:
 organization: American Ornithologists ' Union