user: Question: How many primers annulus colors were there when the color of the bullet tip was White?
Columns: ['Headstamp ID', 'Primer Annulus Color', 'Bullet Tip Color', 'Other Features', 'Functional Type']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['VII or VIIZ', 'Purple', 'None', 'None', 'Light Ball']
SQL:

assistant: SELECT COUNT("Primer Annulus Color") FROM "Table" WHERE "Bullet Tip Color" = 'White';