user: Question: How many release dates has canada had?
Columns: ['Release format', 'Country', 'Label', 'Cat. No.', 'Release date']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Vinyl', 'West Germany', 'Ariola', '203 265-320', 1980.0]
SQL:

assistant: SELECT COUNT("Release date") FROM "Table" WHERE "Country" = 'canada';