35610
But as evidence shows , many castratos , such as Senesino and Caffarelli , were actually altos ( mezzo-soprano ) – not sopranos .
 Senesino, Caffarelli
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Senesino, Caffarelli