Conversation so far:
Where was Recep Tayyip Erdoğan born?
Erdoğan was born in the Kasımpaşa, a poor neighborhood of Istanbul
Who were Recep Tayyip Erdoğan parents?
His parents were Ahmet Erdoğan and Tenzile Erdoğan.

Question: did he have any siblings?
Self-contained rewrite: Did Recep Tayyip Erdoğan have any siblings?