107655
At first an enemy of the East Roman ( Byzantine ) Empire , he raided Palestine but was defeated , becoming a Byzantine vassal in 502 until circa 520 , and again in 527 until his death a year later .
 East Roman ( Byzantine ) Empire, Palestine, Byzantine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 East Roman ( Byzantine ) Empire, Palestine, Byzantine