Conversation so far:
where did twenty one pilots go to high school
Twenty One Pilots' Joseph Tyler is a graduate of Worthington Christian High School and drummer Josh Dun is a graduate of Tree of Life High School.
when did josh dun graduate from high school
Josh Dun is a 2006 graduate of Tree of Life High School
where is twenty one pilots from
Twenty One Pilots is an American musical duo that originates from Columbus, Ohio.
what is notable about columbus, ohio
Columbus, Ohio, is famous for having one of the largest universities and football schools in North America, as well as being home to one of the country's top zoos.

Question: what zoo
Self-contained rewrite: what zoo is in columbus, ohio