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

### Instruction:
What is the sum of revenue for the banking industry with a Forbes 2000 rank under 53?

### Inputs:
table_name: table, columns: ['Rank', 'Rank Forbes 2000', 'Name', 'Headquarters', 'Revenue (Bn.$)', 'Profit (Bn.$)', 'Assets (Bn.$)', 'Market value (Bn.$)', 'Industry']

### Response:
SELECT SUM Revenue (Bn.$) FROM table WHERE Industry = banking AND Rank Forbes 2000 < 53