user: Question: When has a Site of Tainan City and a Score of 8–6?
Columns: ['Year', 'Winning team', 'Losing team', 'Score', 'Site']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1991.0, 'Uni-President Lions', 'Wei Chuan Dragons', '13–5', 'Taipei City']
SQL:

assistant: SELECT "Year" FROM "Table" WHERE "Site" = 'Tainan City' AND "Score" = '8–6';