24966
mmO2 plc was replaced by O2 plc in a further share-swap in 2005 , and subsequently bought in an agreed takeover by Telefónica for £ 18 billion and delisted .
 mmO2, O2, Telefónica
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 mmO2, O2, Telefónica