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Up to 1950 , the Landtag convened in Lübeck , Flensburg and Eckernförde as well as in Kiel .
 Lübeck, Flensburg, Eckernförde, Kiel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lübeck, Flensburg, Eckernförde, Kiel