user: Question: Which Heat has a Nationality of Bulgaria, and a Result larger than 55.97?
Columns: ['Rank', 'Heat', 'Name', 'Nationality', 'Result']
Types: ['real', 'real', 'text', 'text', 'real']
Sample row: [1.0, 1.0, 'Sheena Tosta', 'United States', 54.07]
SQL:

assistant: SELECT "Heat" FROM "Table" WHERE "Nationality" = 'Bulgaria' AND "Result" > 55.97;