0_Apprentice
Track and field event is my favorite sport in the Olympics
1_Wizard
I agree, these athletic contests established on the skills of running, jumping, and throwing are really exciting to watch!
0_Apprentice
Who are the best sprinters in the event?
1_Wizard
Well, Sam Stoller was an American sprinter and long jumper who tied the world record in the 60-yard dash in 1936. He was very talented!
0_Apprentice
How about other renowned current sprinted you know?
1_Wizard
I can think of Peter Sagan, a Slovak professional road bicycle racer for UCI WorldTeam. He has great skills
0_Apprentice
Thought you would care to mention Usain bolt 
1_Wizard
Well, he is retired sprinter. 
0_Apprentice
So who are the non retired sprinters then,the 60's to 90's are past
1_Wizard
There are far too many to list, but  Irena Szewińska, is a notable one.