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The Cathedral contained the tombs of Pope Innocent III ( 1198 – 1216 ) , Pope Urban IV ( 1261 – 1264 ) , and Pope Martin IV ( 1281 – 1285 ) .
 Pope Innocent III, Pope Urban IV, Pope Martin IV
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pope Innocent III, Pope Urban IV, Pope Martin IV