32865
Recent acquisitions of stakes in KazGerMunai and CITIC Canada Energy Limited , mid-sized oil producers in Kazakhstan , helped its stock return around 111.7 % by the end of 2007 from the date of the IPO and listings on London Stock Exchange and Kazakhstan Stock Exchange .
 London Stock Exchange, Stock Exchange
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 London Stock Exchange, Stock Exchange