Conversation so far:
When was Hasan al-Askari born?
In 231 or 232 A.H., Hasan al-Askari was born in Medina.
Where was Hasan al-Askari born?
In 231 or 232 A.H., Hasan al-Askari was born in Medina.

Question: Who were his parents?
Self-contained rewrite: Who were Hasan al-Askari's parents?