user: Question: What is the number of races that took place with points of 257?
Columns: ['Driver', 'Points', 'Season', 'Races', 'Percentage of possible points']
Types: ['text', 'real', 'text', 'real', 'text']
Sample row: ['Sebastian Vettel', 392.0, '2011', 19.0, '82.53%']
SQL:

assistant: SELECT SUM("Races") FROM "Table" WHERE "Points" = 257.0;