25024
The resulting offspring is registered in the " appendix " of the American Quarter Horse Association 's studbook , hence the nickname .
 organization: American Quarter Horse 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 Quarter Horse Association 
Answer:
 organization: American Quarter Horse Association