Conversation so far:
What was it like during the White house years for Mary Todd Lincoln?
During her White House years, Mary Todd Lincoln faced many personal difficulties generated by political divisions within the nation.
Was Mary Todd Lincoln ever placed in a mental institution?
Mary Todd Lincoln was briefly involuntarily institutionalized for psychiatric disease ten years after her husband's murder, but later retired to the home of her sister.
Was Mary Todd Lincoln ever arrested?
Was Abraham Lincoln embarrassed by Mary Todd Lincoln?

Question: How long did she live in the White House?
Self-contained rewrite: How long did Mary Todd Lincoln live in the White House?