Conversation so far:
Where did Zappa grow up?
Baltimore, Maryland.
Did he have a happy childhood?
Due to their home's proximity to the arsenal, which stored mustard gas, gas masks were kept in the home in case of an accident.
Did they stay in Baltimore?
moved to Monterey, California.
Did he enjoy California more than Maryland?
They soon moved to Claremont, California, then to El Cajon, before finally settling in San Diego.
Who was in his immediate family?
Frank, the eldest of four children.

Question: Who else?
Self-contained rewrite: Besides four younger children who else was in Frank Zappa's immediate family in San Diego?