user: Question: How many defending champs from Thailand?
Columns: ['Tournament', 'Also currently known as', 'City', 'Country', 'Court surface', 'Defending champion']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Auckland', 'ASB Classic', 'Auckland', 'New Zealand', 'Outdoors hard', 'Agnieszka Radwańska']
SQL:

assistant: SELECT COUNT("Defending champion") FROM "Table" WHERE "Country" = 'Thailand';