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He transferred to Bayer 04 Leverkusen in 2001 , where he played until 2005 when his contract expired .
 organization: Bayer 04 Leverkusen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: Bayer 04 Leverkusen