1042
Pope Eugene IV was concerned that the enslavement of newly baptized Christians would impede the spread of Christianity and therefore issued a Papal Bull , " Creator Omnium " , on 17 December 1434 .
 Pope Eugene 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 Eugene IV