13593
The 15-year indiction cycle established by Diocletian in 297 was based on quindecennial censuses and formed the basis for dating in late antiquity and under the Byzantine Empire .
 Diocletian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Diocletian