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Preparatory work began in 1984 and work on adapting the line for S-Bahn operations began on 15 June 1988 , with work completed for the opening of S-Bahn services on the line on 22 November 1992 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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