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Links to Ronnie Biggs Oloff Hennig was also a close friend of legendary British train robber Ronnie Biggs .
 Ronnie Biggs, Ronnie Biggs
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ronnie Biggs, Ronnie Biggs