Conversation so far:
Why did she have a lobotomy?
calm her mood swings and stop her occasional violent outbursts
Where was the lobotomy procedure that would help Rosemary Kennedy calm her mood swings and occasional violent outbursts done?
The George Washington University Hospital

Question: Who was the doctor that performed the lobotomy?
Self-contained rewrite: Who was the doctor that performed the lobotomy on Rosemary Kennedy at the George Washington University Hospital?