user: Question: Which Senior status has a Chief Judge of 1991–1995?
Columns: ['State', 'Born/Died', 'Active service', 'Chief Judge', 'Senior status', 'Appointed by', 'Reason for termination']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['WI', '1801–1874', '1870–1873 Reassigned from District of Wisconsin', '—', '—', 'Polk Category:Articles with hCards', 'retirement']
SQL:

assistant: SELECT "Senior status" FROM "Table" WHERE "Chief Judge" = '1991–1995';