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Several organizations , such as the American Association of Variable Star Observers and the British Astronomical Association , exist to help coordinate these contributions .
 organization: American Association of Variable Star Observers; organization: British Astronomical Association
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 Association of Variable Star Observers, British Astronomical Association 
Answer:
 organization: American Association of Variable Star Observers; organization: British Astronomical Association