Conversation so far:
where was the first mcdonalds in phoenix az
The first McDonalds was located at 4050 North Central Avenue in Phoenix, Arizona.
who were the founders of McDonalds?
Richard and Maurice McDonald are the founders of McDonalds.
what is the stock ticker symbol for McDonalds?
MCD is the stock ticker symbol for McDonalds.
how many employees does McDonalds have?
McDonalds had about 210,000 employees in 2018.

Question: where is the headquarters?
Self-contained rewrite: where is the headquarters of McDonalds?