Conversation so far:
where did mcdonald's open their first restaurant?
the first McDonalds was opened by Richard and Maurice McDonald in San Bernardino, California in 1940
is the first McDonald's restaurant still open?
The San Bernardino store was demolished in 1976
who was the first McDonald's restaurant cook?
Richard McDonald
where is the oldest still operating McDonald's restuarant?
The oldest operating McDonald's restaurant is a drive-up hamburger stand at 10207 Lakewood Boulevard at Florence Avenue in Downey, California.

Question: are the brothers still alive?
Self-contained rewrite: are the McDonald brothers still alive?