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The known rulers of Tikal , a major centre of the Pre-Columbian Maya civilization in modern day Guatemala : Late Preclassic Early Classic Hiatus Late Classic Note : English language names are provisional nicknames based on their identifying glyphs , where rulers ' Maya language names have not yet been definitively deciphered phonetically .
 Guatemala
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Guatemala