user: ### NOW ANSWER:
Question: I want to know the sum of points with a previous rank of 3
Columns: ['Rank', 'Previous Rank', 'Name', 'Nationality', 'Team', 'Points']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, '1', 'Davide Rebellin', 'Italy', 'Gerolsteiner', 157.0]
SQL:

assistant: SELECT SUM("Points") FROM "Table" WHERE "Previous Rank" = '3';