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There are , though , records of some young boys asking to be operated on to preserve their voices ( e.g. Caffarelli , who was from a wealthy family : his grandmother gave him the income from two vineyards to pay for his studies ) .
 Caffarelli
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Caffarelli