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Wardon or Warden Abbey , Bedfordshire was one of the senior Cistercian houses of England , founded about 1135 from Rievaulx Abbey .
 Warden, Bedfordshire, Cistercian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Warden, Bedfordshire, Cistercian