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Italian sprinter Alessandro Petacchi of won three of the first eleven stages of this Giro , but his subsequent disqualification for a non-negative salbutamol test after stage 11 nullified these victories .
 Alessandro Petacchi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alessandro Petacchi