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Tony Kettle is an award winning architect best known for designing the Falkirk Wheel in Scotland and Lakhta Centre , Gazprom Head Quarters in Saint Petersburg , Russia .
 Gazprom, Saint Petersburg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gazprom, Saint Petersburg