Conversation so far:
Where was William Henry Dietz born?
Rice Lake, Wisconsin, at 16 West Humbird Street.
What was William Henry Dietz known for?
William Henry Dietz was the head coach of the National Football League's Boston Redskins. He was inducted into the College Football Hall of Fame as a coach in 2012.
How did William Henry Dietz get involved in sports?
William Henry Dietz played at the Carlisle Indian Industrial School of Carlisle, Pennsylvania.
Was William Henry Dietz ever married?
William Henry Dietz married Doris O. Pottlitzer
What else did you find interesting about William Henry Dietz?
In 1921, William Henry Dietz took a coaching position with Purdue University in Indiana.

Question: How long did he stay?
Self-contained rewrite: How long did William Henry Dietz stay?