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Major airports in the state are Visakhapatnam , Rajamahendravaram , Vijayawada , with Visakhapatnam , Tirupati and Vijayawada being international airports .
 Visakhapatnam, Rajamahendravaram, Vijayawada, Visakhapatnam, Tirupati, Vijayawada
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Visakhapatnam, Rajamahendravaram, Vijayawada, Visakhapatnam, Tirupati, Vijayawada