List of doping cases in athletics

Columns: Name | Country | Event | Date of violation | Banned substance ( s ) / Anti-doping rule violation | Sanction
Meliz Redif | Turkey | Sprinting | 2012 | Biological passport | 3 years | Dimitrios Regas | Greece | Sprinting | 2008 | Methyltrienolone | 2 years | Julio Rey | Spain | Long distance | 1999 | Mesterolone | 2 years | Butch Reynolds | United States | Sprinting | 1990 | Anabolic steroids | 2 years | Antoine Richard | France | Sprinting | 1987 | 2 years | Mark Richardson | Great Britain | Sprinting | 1999 | Nandrolone | 18 months ( reduced from 2 years ) | Elisa Rigaudo | Italy | Race walking | 2002 | Caffeine | Public warning

Example questions:
In what year did the earliest competitor with initial R on the list of doping cases compete in the Olympic games ? | The most recent race walking violator with initial R for doping competed in the Olympics in what year ? | Which of the athlete with initial R that were disqualified in 2013 for doping was older ? | Which of the US competitors with initial R on the list of doping cases is younger ?

Answers:
1980 | 2012 | Ebrahim Rahimian | Michael Rodgers