239852
He had no notable performances as a youth and a junior and was 12th in the IAAF world junior rankings in 2005 with a personal best performance of 72.14 with the 6 kg hammer by the end of June .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None