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The English Civil War led to the establishment of the Commonwealth of England and eventually the Protectorate of Oliver Cromwell .
 Commonwealth of England, Protectorate, Oliver Cromwell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Commonwealth of England, Protectorate, Oliver Cromwell