Conversation so far:
When was Muhammad Ali born?
Cassius Marcellus Clay Jr. was born on January 17, 1942
Where was Muhammad Ali born?
Cassius Marcellus Clay Jr. was born on January 17, 1942 in Louisville, Kentucky
Who were Muhammad Ali's parents?
Muhammad Ali's father was a sign and billboard painter, and his mother, Odessa O'Grady Clay, was a domestic helper.
Did Muhammad Ali know his mother?
Although Cassius Sr. was a Methodist, he allowed Odessa to bring up both Muhammad Ali and his younger brother, Rudolph Rudy Clay

Question: when did he start boxing
Self-contained rewrite: When did Muhammad Ali start boxing?