user: Question: When was 10 (10) bought?
Columns: ['City of license /Market', 'Station', 'Channel TV ( DT )', 'Owned since', 'Primary affiliation']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Phoenix', 'KSAZ-TV ++', '10 (10)', '1997', 'Fox']
SQL:

assistant: SELECT "Owned since" FROM "Table" WHERE "Channel TV ( DT )" = '10 (10)';