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The Netherlands was represented by six-member group Teach-In , with the song ' " Ding-A-Dong " , at the 1975 Eurovision Song Contest , which took place in Stockholm on 22 March .
 Stockholm
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stockholm