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
Who was the doctor that performed the lobotomy on Rosemary Kennedy at the George Washington University Hospital?
James W. Watts
Was the lobotomy performed on Rosemary Kennedy at the george washington University Hospital by James W. Watts successful?
the procedure had not been successful. Rosemary Kennedy's mental capacity diminished to that of a two-year-old child. She could not walk or speak intelligibly and was incontinent
Did Rosemary Kennedy  live with her family after the procedure the procedure had not been successful and  her capacity diminished to that of a two-year-old child?
Rose Mary Kennedy lived at Craig House, a private psychiatric hospital north of New York City. In 1949, she was relocated to Jefferson, Wisconsin
Did anything else happen as a result of Rosemary Kennedy's lobotomy?
Rose Mary Kennedy could not walk or speak intelligibly and was incontinent
Was there a specific event or events that lead to Rosemary Kennedy having a lobotomy?
Rose Mary Kennedy would often experience convulsions and fly into violent rages in which she would hit and injure others
How did Rosemary Kennedy's family feel after the lobotomy?

Question: How old was she when the lobotomy was performed?
Self-contained rewrite: How old was Rosemary Kennedy when the lobotomy was performed?