Conversation so far:
Who did Diego Maradona manage?
Mandiyú de Corrientes, Racing Club, Argentina, etc.
How long was Maradona the team coach for Argentina?
2008–2010
How many wins did Maradona have with Argentina?
18
How many years was Maradona a team manager?
Since 1994

Question: What years was he a team manager?
Self-contained rewrite: What years was Maradona a team manager?