87873
The prison is owned by the Duchy of Cornwall , and is operated by Her Majesty 's Prison Service .
 Duchy of Cornwall, Her Majesty 's Prison Service
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Duchy of Cornwall, Her Majesty 's Prison Service