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While attending Sousa High School in Chiba , majoring in English , he started to fully participate in the 125cc class of All Japan Road Race Championship and gained 2nd place for 2006 season .
 Chiba
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chiba