user: Question: How many years has station KPIX been owned?
Columns: ['City of License /Market', 'Station', 'Channel TV ( DT )', 'Years owned', 'Current affiliation']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['San Francisco - Oakland - San Jose', 'KPIX', '5 (29)', '1954–1995', 'CBS owned-and-operated ( O&O )']
SQL:

assistant: SELECT SUM("Years owned") FROM "Table" WHERE "Station" = 'KPIX';