208340
Some 20,000 people gathered for the demonstration , which ended with a huge march at midnight , led by the flags of the ' lost provinces ' to the ancient town centre where a further closing speech was made by Heinrich Lummer .
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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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