user: Question: How many qualifying start dates for the CONCACAF confederation?
Columns: ['Confederation', 'Teams started', 'Teams that have secured qualification', 'Teams that can still qualify', 'Teams that have been eliminated', 'Remaining places in finals', 'Total places in finals', 'Qualifying start date', 'Qualifying end date']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Confederation', 'Teams started', 'Teams that have secured qualification', 'Teams that can still qualify', 'Teams that have been eliminated', 'Remaining places in finals', 'Total places in finals', 'Qualifying start date', 'Qualifying end date']
SQL:

assistant: SELECT COUNT("Qualifying start date") FROM "Table" WHERE "Confederation" = 'CONCACAF';