Conversation so far:
who is julian lennon?
Lennon's first son Julian.
when was he born?
Julian was born on 8 April 1963.
who was his mother?
Julian's birth, like his mother Cynthia's marriage to Lennon, was kept secret.
were was he born?
CANNOTANSWER.

Question: did he play any instruments?
Self-contained rewrite: Did Julian Lennon play any instruments?