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Improving steadily under the coaching of Ed Injachock he improved to 3.80 m in 1958 and in 1959 he ranked 8th among American schoolboys with 4.14 m ( 13 ft 7 in ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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