user: Question: What was the lowest lap with the ranking of 19?
Columns: ['Year', 'Start', 'Qual', 'Rank', 'Finish', 'Laps']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['1960', '28', '142.354', '29', '9', 200.0]
SQL:

assistant: SELECT MIN("Laps") FROM "Table" WHERE "Start" = '19';