user: Question: What was Liu Limin's time in heat 4?
Columns: ['Rank', 'Heat', 'Lane', 'Name', 'Nationality', 'Time']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 3.0, 5.0, 'Misty Hyman', 'United States', '2:07.87']
SQL:

assistant: SELECT "Time" FROM "Table" WHERE "Heat" = 4.0 AND "Name" = 'Liu Limin';