Conversation so far:
When did Steven Seagal get involved in martial arts?
Steven Seagal  started studying martial arts under Fumio Demura when he was a child.
What kind of martial arts was Steven Seagal doing?
Steven Seagal trained in aikido, karate, judo and kendo.
Who did Steven Seagal train with?
Steve Seagal started studying martial arts under Fumio Demura when he was a child. Seagal later traveled to Japan at the age of 17 where he perfected his martial arts.

Question: Did he earn a black belt?
Self-contained rewrite: Did Steven Seagal earn a black belt?