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The American Association for Cancer Research ( AACR ) is the world 's oldest and largest professional association to advancing cancer research .
 organization: Cancer Research
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: Cancer Research 
Answer:
 organization: Cancer Research