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Ikea  's announcement came after a series of public complaints including from the company's founder the secretive billionaire  Ingvar Kamprad  who went on Swedish radio to complain that Russian authorities had cheated the company out of millions of dollars by overcharging for electricity .
 Ikea, Ingvar Kamprad
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 Ikea, Ingvar Kamprad