17684
By comparison , Marita Koch 's 21.71 second runs in 1979 and 1984 had tail winds of + 0.7 " m/s and + 0.3 " m/s respectively .
 Marita Koch
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marita Koch