99201
His formal education , which did not began until at age 15 in the midst of the socialist campaigns to eradicate illiteracy ; around this time he found employment in various jobs involving manual labor , including as a porter and railway depot employee .
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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:
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