9728
Nonetheless , these lost primary sources , along with the works of Seneca and Philo , were the basis of surviving secondary and tertiary histories on Caligula written by the next generations of historians .
 Seneca, Philo, Caligula
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Seneca, Philo, Caligula