user: ### NOW ANSWER:
Question: Which Rating has a Centre of Helsinki?
Columns: ['Rank', 'Centre', 'Country', 'Rating', 'Change']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [41.0, 'Isle of Man ( CD )', 'Isle of Man ( CD )', 638.0, 7.0]
SQL:

assistant: SELECT SUM("Rating") FROM "Table" WHERE "Centre" = 'Helsinki';