Conversation so far:
who played maximum matches for india in all international formats of cricket
Sachin Tendulkar has played 664 international cricket matches in total.
when did sachin tendulkar take up cricket
Sachin Tendulkar took up cricket at the age of eleven
when did sachin tendulkar make his debut
Sachin Tendulkar made his Test debut on 15 November 1989 against Pakistan in Karachi at the age of sixteen
what is sachin tendulkar's nickname
Sachin Tendulkar is colloquially known as Little Master or Master Blaster

Question: when did he retire
Self-contained rewrite: when did sachin tendulkar retire