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In July 2009 he returned to his first club De Graafschap , but a hard injury made an end to his professional career .
 organization: De Graafschap
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: De Graafschap