user: Question: How many years has there been a competition in helsinki?
Columns: ['Year', 'Competition', 'Date', 'Location', 'Score', 'Result']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1989.0, 'Europe/Africa Zone Group II, Quarterfinal', '5–7 May', 'Warsaw', '2-3', 'Loss']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Location" = 'helsinki';