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Franz Liszt and Frédéric Chopin visited Vienna when they were young , but they then moved on to other cities .
 Franz Liszt, Frédéric Chopin, Vienna
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Franz Liszt, Frédéric Chopin, Vienna