user: Question: With a Mark of 46.47, What is the lowest Heat?
Columns: ['Heat', 'Lane', 'Name', 'Country', 'Mark']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 6.0, 'Sean Wroe', 'Australia', '47.23 PB']
SQL:

assistant: SELECT MIN("Heat") FROM "Table" WHERE "Mark" = '46.47';