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

### Instruction:
What engine has a start less than 7, and 23 as a finish?

### Inputs:
table_name: table, columns: ['Year', 'Chassis', 'Engine', 'Start', 'Finish', 'Team']

### Response:
SELECT Engine FROM table WHERE Start < 7 AND Finish = 23