Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What rank is from Japan, has a lane smaller than 7 and a heat smaller than 3?

### Inputs:
table_name: table, columns: ['Rank', 'Heat', 'Lane', 'Name', 'Nationality', 'Time']

### Response:
SELECT SUM Rank FROM table WHERE Nationality = japan AND Lane < 7 AND Heat < 3