Conversation so far:
Where was Andrew Johnson born?
Andrew Johnson was born in Raleigh, North Carolina.
who were Andrew Johnson's parents?
Andrew Johnson was born to Jacob Johnson and Mary (Polly) McDonough.
what is Andrew Johnson's birth date?
Andrew Johnson was born on December 29, 1808.

Question: Did he have any siblings?
Self-contained rewrite: Did Andrew Johnson have any siblings?