214285
Foundation A monastery is known to have existed at Bermondsey before 715 AD , when it was a Surrey colony of the important Mercia n monastery of Medeshamstede , later known as Peterborough .
 Surrey, Mercia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Surrey, Mercia