26603
The Association of Personal Historians ( APH ) is an international non-profit trade association dedicated to developing , supporting and marketing the work of self-employed writers and small businesses who are engaged in preparing memoirs and recording the lives of individuals , families and communities .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None