285022
The studies compiled by the staff pertained to all major areas of non-medical veterans benefits and included studies of the historical background of benefits , how benefits were administered , eligibility requirements , distinctions between service-connected and non-service-connected benefits , and benefits granted to survivors of veterans .
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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