user: Question: What is the total amount of time for years prior to 2013 when speed option is the stage?
Columns: ['Stage', 'Shooter', 'Time', 'Avg. Run', 'Year']
Types: ['text', 'text', 'real', 'real', 'real']
Sample row: ['Five To Go', 'Kay Miculek', 11.95, 2.98, 2006.0]
SQL:

assistant: SELECT SUM("Time") FROM "Table" WHERE "Stage" = 'speed option' AND "Year" < 2013.0;