user: Question: how many is the minimum for CITV
Columns: ['City', 'Station', 'Year acquired', 'Primary programming source', 'Other programming sources', 'Current status']
Types: ['text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['Edmonton', 'CITV', 1991.0, 'Global', 'WIC', 'Global O&O']
SQL:

assistant: SELECT MIN("Year acquired") FROM "Table" WHERE "Station" = 'CITV';