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The Synod of Chester ( Medieval Latin : Sinodus Urbis Legion ( um ) ) was an ecclesiastical council of bishops held in Chester in the late 6th or early 7th century .
 Chester, Chester
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chester, Chester