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Princess Ketevan married George , the eldest son of King Heraclius II and heir apparent to the throne of the Kingdom of Kartli and Kakheti in 1766 .
 Heraclius II
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Heraclius II