226813
The show also claimed that the BPI had used its own estimate of forty million subscribers instead of the official Office of National Statistics estimate of thirty-four million , and thus offered a more conservative estimate of 3.9 to 5.6 million file-sharers based on the study alone .
 Office of National Statistics
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Office of National Statistics