user: Question: In heat rank 7, what is the sum of lanes?
Columns: ['Heat Rank', 'Lane', 'Swimmer', 'Country', 'Time', 'Overall Rank']
Types: ['real', 'real', 'text', 'text', 'real', 'text']
Sample row: [1.0, 3.0, 'Dinko Jukić', 'Austria', 25.11, '54']
SQL:

assistant: SELECT SUM("Lane") FROM "Table" WHERE "Heat Rank" = 7.0;