Conversation so far:
When did Tyson Chandler begin playing basketball?
Tyson Chandler began playing basketball at the age of three years.
Who were Tyson Chandler's parents?
Frank Chandler and Vernie Threadgill were Tyson Chandler's parents.
Where did Tyson Chandler grow up
Tyson Chandler grew up in a family farm in Hanford, California.

Question: When did his high school career begin?
Self-contained rewrite: When did Tyson Chandler's high school career begin?