Conversation so far:
how old was Imran khan at the height of his career?
At the height of his career, in 1982, the thirty-year-old Khan took over the captaincy of the Pakistan cricket
how old was Imran khan when he took the last winning wicket?
At the age of 39, Imran Khan took the winning last wicket himself

Question: who was khan?
Self-contained rewrite: who was Imran khan?