user: Question: What is the smallest number of matches with Bonus Pts of 19 and Total Points greater than 421?
Columns: ['Rider', 'Matches', 'Rides', 'Bonus Pts', 'Total Points']
Types: ['text', 'real', 'real', 'real', 'real']
Sample row: ['Eric Boocock', 38.0, 161.0, 19.0, 421.0]
SQL:

assistant: SELECT MIN("Matches") FROM "Table" WHERE "Bonus Pts" = 19.0 AND "Total Points" > 421.0;