sentences:  Walter Dix
  
  Walter Dix (born January 31, 1986) is a retired American sprinter who specialized in the 100 meters and 200 meters.He is the fifth-fastest 200-meter runner ever with a best of 19.53 seconds, and has broken the 10-second barrier in the 100 meters, with a best of 9.88 (9.80w) seconds.