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By the 1970s the company had become the main supplier of bicycles to German supermarkets and mail order houses which eventually led to the company starting to manufacture bicycle frames and other parts in its own factories in order to ensure stabler supplies .
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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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