user: Question: who is the winner when the home team is Sioux Falls Storm and the year is earlier than 2012?
Columns: ['Year', 'Home Team', 'Away Team', 'Winner', 'Score']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2009.0, 'Billings Outlaws', 'RiverCity Rage', 'Outlaws', '71-62']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Home Team" = 'Sioux Falls Storm' AND "Year" < 2012.0;