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

### Instruction:
What is the sum of Second, when Total is less than 70, when Premier is less than 20, and when First is greater than 18?

### Inputs:
table_name: table, columns: ['Season', 'Premier', 'First', 'Second', 'Total']

### Response:
SELECT SUM Second FROM table WHERE Total < 70 AND Premier < 20 AND First > 18