58424
In a survey on nine international data centers carried out in December 2012 and January 2013 and measuring availability ( up-time ) and performance ( delay by which the data from the requested website was received ) , the top three positions were held by Luxembourg data centers .
 Luxembourg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Luxembourg