user: Question: What was the highest heat with a time slower than 48.87 from Sweden?
Columns: ['Rank', 'Heat', 'Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'real', 'real', 'text', 'text', 'real']
Sample row: [1.0, 2.0, 4.0, 'Jason Lezak', 'United States', 48.51]
SQL:

assistant: SELECT MAX("Heat") FROM "Table" WHERE "Time" > 48.87 AND "Nationality" = 'Sweden';