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Claypole married Elizabeth , Oliver Cromwell 's second daughter , before October 1646 , and raised a troop of horse for Parliament to oppose Charles II in 1651 .
 Claypole, Elizabeth, Oliver Cromwell, Charles II
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Claypole, Elizabeth, Oliver Cromwell, Charles II